    AutoCAD Command List  (' = transparent command)

APERTURE       CHANGE         DIVIDE         EXPLODE        IGESOUT 
ARC            CHPROP         DONUT          EXTEND         INSERT 
AREA           CIRCLE         DOUGHNUT       FILES          ISOPLANE  
ARRAY          COLOR          DRAGMODE       FILL           LAYER   
ATTDEF         COPY           DTEXT          FILLET         LIMITS    
ATTDISP        DBLIST         DVIEW          FILMROLL       LINE     
ATTEDIT        DDATTE         DXBIN          'GRAPHSCR      LINETYPE  
ATTEXT         'DDEMODES      DXFIN          GRID           LIST    
AXIS           'DDLMODES      DXFOUT         HANDLES        LOAD       
BASE           'DDRMODES      EDGESURF       HATCH          LTSCALE 
BLIPMODE       DDUCS          ELEV           'HELP / '?     MEASURE
BLOCK          DELAY          ELLIPSE        HIDE           MENU     
BREAK          DIM/DIM1       END            ID             MINSERT  
CHAMFER        DIST           ERASE          IGESIN         MIRROR 

\
    AutoCAD Command List  (' = transparent command)

MOVE           PRPLOT         ROTATE         STRETCH        UNITS
MSLIDE         PURGE          RSCRIPT        STYLE          'VIEW      
MULTIPLE       QTEXT          RULESURF       TABLET         VIEWPORTS
OFFSET         QUIT           SAVE           TABSURF        VIEWRES
OOPS           REDEFINE       SCALE          TEXT           VPOINT  
ORTHO          REDO           SCRIPT         'TEXTSCR       VPORTS  
OSNAP          'REDRAW        SELECT         TIME           VSLIDE
'PAN           'REDRAWALL     'SETVAR        TRACE          WBLOCK 
PEDIT          REGEN          SHAPE          TRIM           'ZOOM    
PLAN           REGENALL       SHELL/SH       U              3DFACE
PLINE          REGENAUTO      SKETCH         UCS            3DMESH 
PLOT           RENAME         SNAP           UCSICON        3DPOLY
POINT          'RESUME        SOLID          UNDEFINE     
POLYGON        REVSURF        STATUS         UNDO                
                                                    
At the "Command:" prompt, you can enter RETURN to repeat the last command.

\
You can enter points, or coordinates, in any of the following ways:

   Absolute:  x,y
   Relative:  @deltax,deltay
   Polar:     @dist<angle

For the commands that accept 3D points, you can include a Z coordinate
in the absolute and relative formats:

   Absolute:  x,y,z
   Relative:  @deltax,deltay,deltaz

If you omit the Z coordinate, the current elevation is used.

X/Y/Z filters can be used to compose a full point from the X, Y, and
Z components of intermediate points.  For instance, the filter ".X"
will instruct AutoCAD to use just the X coordinate of the following
point.  The Y (and possibly Z) values will then be requested.

See also:   Section 2.7 of the Reference Manual.

\
Object selection:  ("Select objects:")

   (point)  =  One object
   Multiple =  Multiple objects selected by pointing
   Last     =  Last object
   Previous =  All objects in the Previous selection-set
   Window   =  Objects within Window
   Crossing =  Objects within or Crossing window
   BOX      =  Automatic Crossing (to the left) or Window (to the right)
   AUto     =  Automatic BOX (if pick in empty area) or single object pick
   SIngle   =  One selection (any type)
   Add      =  Add mode: add following objects to selection-set
   Remove   =  Remove mode: remove following objects from selection-set
   Undo     =  Undo/remove last

When you are satisfied with the selection-set as it stands, enter RETURN
(except for "Single" mode, which does not require an extra RETURN).

See also:   Section 2.9 of the Reference Manual.
\APERTURE
The  APERTURE  command governs the size of the "target" crosshairs
for object snap purposes.

Format:     APERTURE
            Object snap target height (1-50 pixels) <default>: (number)

See also:   Section 8.7 of the Reference Manual.
\ARC
The  ARC  command draws an arc (circle segment) as specified by any of
the following methods.

  - three points on the arc
  - start point, center, end point
  - start point, center, included angle
  - start point, center, length of chord
  - start point, end point, radius
  - start point, end point, included angle
  - start point, end point, starting direction
  - continuation of previous line or arc

3-point format:  ARC  Center/<Start point>:  (point)
                 Center/End/<Second point>:  (point)
                 End point:  (point)

Options:  A = included Angle    D = starting Direction    L = Length of chord
          C = Center point      E = End point             R = Radius
          To continue previous line or arc, reply to first prompt with RETURN

See also:   Section 4.4 of the Reference Manual.
\AREA
The  AREA  command calculates the area and perimeter enclosed by a sequence
of points you enter, or defined by a specified circle or polyline.  A running
total of measured areas can be kept, and you can ask AutoCAD to add or
subtract subsequent areas from the total.

Format:     AREA  <First point>/Entity/Add/Subtract:  (point)
            Next point:  (point)
            Next point:  (point)
            Next point:  ...press RETURN to end point entry
            Area = nnnn  Perimeter = nnnn

If add or subtract mode has been selected, AREA then adds to (or subtracts
from) the running total, displays the running total, and repeats the options
prompt.  The options are:

    Add       - Adds the area to the running total.
    Subtract  - Subtracts the area from the running total.
    Entity    - Computes the area of a selected Circle or Polyline
    RETURN    - A null reply exits the AREA command

See also:   Section 5.6 of the Reference Manual.
\ARRAY
The  ARRAY  command makes multiple copies of selected objects, in a
rectangular or circular pattern.

Format:     ARRAY  Select objects: (Show what to copy)
            Rectangular or Polar array (R/P):

For a rectangular array, you are asked for the number of columns and
rows, and the spacing between them.  The array is built along a baseline
defined by the current Snap rotation angle set by the "SNAP Rotate" command.

For a polar, or circular, array, you must first supply a center point.
Following this, you must supply two of the following three parameters:

  - the number of items in the array
  - the number of degrees to fill
  - the angle between items in the array

Optionally, you can rotate the items as the array is drawn.

See also:   Section 5.2 of the Reference Manual.
\ATTDEF
The  ATTDEF  command creates an Attribute Definition. First, you specify
the modes for this Attribute Definition.  The modes are:

   Invisible  - Do not display, but allow extraction.
   Constant   - All occurrences of this Attribute have the same Value.
   Verify     - Issue extra prompts to verify a proper Value.
   Preset     - Do not prompt for this Attribute during Block insertion.

Format: ATTDEF Attribute modes -- Invisible:N  Constant:N  Verify:N  Preset:N
        Enter (ICVP) to change, RETURN when done:

The tag, prompt, and default value for the Attribute are then requested,
as are its location, height, and rotation angle.

            Attribute tag: (up to 31 chars; letters, digits, $, -, _)
            Attribute prompt:
            Default attribute value:
            Start point or Align/Center/Fit/Middle/Right/Style:
            Height <default>:
            Rotation angle <default>:

See also:   Section 9.2 of the Reference Manual.
\ATTDISP
The  ATTDISP  command can be used to override the visibility mode set for
Attributes on a global basis.

Format:     ATTDISP  Normal/ON/OFF <current>:

   Normal  - Visible Attributes are displayed, invisible Attributes are not.
   On      - All Attributes are made visible.
   Off     - All Attributes are made invisible.

See also:   Section 9.2 of the Reference Manual.
\ATTEDIT
The  ATTEDIT  command allows you to modify certain aspects of Attributes
independent of the Blocks in which they reside.  You can perform global or
individual editing, and you can restrict the operation to certain Blocks,
Attribute Tags, and Attribute Values, or to just those Attributes that are 
currently visible on the screen.

Format:     ATTEDIT  Edit Attributes one by one? <Y>  (N = global)
            Block name specification <*>:
            Attribute tag specification <*>:
            Attribute value specification <*>:

See also:   Section 9.2 of the Reference Manual.
\ATTEXT
The  ATTEXT  command is used to extract Attribute information from a drawing
for analysis by another program or for transfer to a database. You can
extract the whole drawing or only a selected set of entities.

Format:     ATTEXT  CDF, SDF, or DXF Attribute extract (or Entities)? <C>:

If you respond with an "CDF", "SDF", or "DXF", the entire drawing will
be extracted.  If you respond with an "E," the "Select objects:" prompt
appears, and you may select a set of entities to extract.  ATTEXT then
again prompts:

            CDF, SDF or DXF Attribute extract? <C>:

The extract formats are as follows:

   CDF - Comma Delimited Format
   SDF - Standard (Fixed field) Format
   DXF - Drawing Interchange Format

CDF format is the default Attribute extraction format.

See also:   Section 9.2 of the Reference Manual.
\AXIS
The  AXIS  command controls the display of axes, or ruler lines, along the
edge of the graphics display.

Format:     AXIS  Tick spacing(X) or ON/OFF/Snap/Aspect <current>:

    Spacing(X)  - A simple number sets axis tick spacing in drawing
                  units.  A number followed by "X" (e.g., "2X")
                  sets the tick spacing to a multiple of the current
                  Snap resolution.  A value of zero locks the tick
                  spacing to the current Snap resolution.
    ON          - Turns axis on with previous spacing.
    OFF         - Turns axis off.
    Snap        - Locks the tick spacing to the current Snap
                  resolution (same as a spacing value of zero).
    Aspect      - Permits an axis with different horizontal and
                  vertical spacing.

See also:   Section 8.3 of the Reference Manual.
\BASE
The  BASE  command defines a reference point for insertion
and rotation of the current drawing in subsequent drawings.

Format:     BASE  Base point <default>:  (point)

See also:   Section 9.1 of the Reference Manual.
\BLIPMODE
The  BLIPMODE  command controls the generation of marker "blips" - the
small temporary marks drawn whenever you designate a point.   When
BLIPMODE is "On", blips are drawn; when "Off", blips are suppressed.

Format:     BLIPMODE  ON/OFF <current>:

See also:   Section 6.12 of the Reference Manual.
\BLOCK
The  BLOCK  command allows you to name a group of objects that can
then be INSERTed as a unit anywhere in the current drawing, with
specified X and Y scales and rotation.

Format:     BLOCK  Block name (or ?):  (name)
            Insertion base point:  (point)
            Select objects:  (select)

The objects you select will be erased as they are copied into the
Block.  If you want to restore them, use the OOPS command.

If you respond to the "Block name" prompt with a "?", AutoCAD will
list the names of all Blocks currently defined in this drawing.

See also:   Section 9.1 of the Reference Manual.
\BREAK
The  BREAK  command deletes part of a Line, Trace, Circle, Arc, or
Polyline, or splits the object into two objects of the same type.

Format:     BREAK  Select object: (select one object)
            Enter first point: (point)
            Enter second point: (point)

If you break a circle, it changes to an arc by deleting the portion from
the first point to the second, going counterclockwise.  Breaking a polyline
with nonzero width will cause the ends to be cut square.

If you select the object by pointing to it, the break is assumed
to begin at the selection point, and the next prompt is:

            Enter second point (or F for first point):

If you want to begin the break at a point where some other object
intersects with the object to be broken, choose an unambiguous point
to select the object, and then enter "F" in response to this prompt.
You can then select the beginning and ending points of the break.

See also:   Section 5.3 of the Reference Manual.
\CHAMFER
The  CHAMFER  command trims two intersecting lines (or two adjacent
segments of a Polyline) at a given distance from their intersection and
connects the trimmed ends with a new line.   Different trim distances can
be set for the two lines, and are retained with the drawing.   If the
specified lines do not intersect, CHAMFER will extend them until they do,
and then proceed as above.  Chamfers can be applied to an entire Polyline,
chamfering all the intersections.

Format:     CHAMFER  Polyline/Distances/<select first line>:

   D - Set chamfer distances
   P - Chamfer entire Polyline

See also:   Section 5.3 of the Reference Manual.
\CHANGE
The  CHANGE  command allows you to modify or change the properties
of existing objects in the drawing.

Format:     CHANGE   Select objects:  (select)
            Properties/<Change point>:

In the following descriptions, the selected Change Point is abbreviated
"CP".  Note that the current object being changed is highlighted and can
be dragged as you change its location.

   Line   - Endpoint closest to CP changes to CP (ORTHO can affect this).
   Circle - Radius changes so that CP is on circumference.
   Block  - Location changes to CP.  New angle may be specified.
   Text   - Location changes to CP.  New text style, height, angle,
            and text string may be specified.
   Attribute Definition - Same as Text, plus Attribute tag may be changed.

\
The  CHANGE  command's "Properties" option permits you to change
any or all of the following properties of the selected objects:

   -  layer
   -  color
   -  linetype
   -  elevation
   -  thickness

Format:     CHANGE  Selects objects:  (do so)
            Properties/<Change point>:  P
            Change what property (Color/Elev/LAyer/LType/Thickness)?

Enter the option keyword for the property you wish to change.  You
can abbreviate each option to its capitalized letters.

See also:   Section 5.3 of the Reference Manual.
\CHPROP
The  CHPROP  command is a subset of the CHANGE command which does not
include CHANGE <point> and CHANGE Elevation.  The properties which may 
be changed include color, linetype, layer, and thickness.

Format:     CHPROP Select objects:  (Select)
            Change what property (Color/LAyer/LType/Thickness) ?

Enter the option keyword for the property you wish to change.  You 
can abbreviate each option to its capitalized letters.

See also:   Section 5.3 of the Reference Manual.
\CIRCLE
The  CIRCLE  command is used to draw a circle.  You can specify the circle
in several ways.  The simplest method is by center point and radius.

Format:     CIRCLE  3P/2P/TTR/<Center point>:  (point)
            Diameter/<Radius>:  (radius value)

To specify the radius, you can designate a point to be on the
circumference.  You may enter "DRAG" in response to the "Diameter/<Radius>"
prompt to specify the circle size visually.  If it is more convenient to
enter the diameter than the radius, reply to the "Diameter/<Radius>" prompt
with "D".

The circle can also be specified using three points on the circumference
(reply "3P" when prompted for the center point), or by designating two
endpoints of its diameter (reply "2P").  For these methods, you can "drag"
the last point or specify object snap "Tangent" points.

In addition, you can draw a circle by specifying two lines (and/or other
circles) to which the circle should be tangent, and a radius.  Enter "TTR"
for this option.

See also:   Section 4.3 of the Reference Manual.
\COLOR
\COLORS
The  COLOR  command sets the color for new entities.  Color numbers
1 through 7 have standard meanings as follows:

 1 - Red, 2 - Yellow, 3 - Green, 4 - Cyan, 5 - Blue, 6 - Magenta, 7 - White

You can control the color of each entity individually or by layer.  To change
the color of existing objects, use the  CHANGE  command.  To control layer
colors, use  LAYER.

Format:     COLOR  New entity color <current>:

You can respond with a color number from 1 to 255, or a standard color name
such as "Red".  All new entities will be drawn in this color, regardless
of which layer is current, until you again use the COLOR command.

If you respond with "BYLAYER", new objects you draw will inherit the
color assigned to the layer upon which they are drawn.

If you respond with "BYBLOCK", objects will be drawn in white until they are
grouped into a Block.  Then, whenever that Block is inserted, the objects
will inherit the color of the Block insertion.

See also:   Sections 5.3, 7.7, and 7.8 of the Reference Manual.
\COPY
The  COPY  command is used to duplicate one or more existing drawing
entities at another location (or locations) without erasing the original.

Format:     COPY  Select objects:  (select)
            <Base point or displacement>/Multiple:
            Second point of displacement:  (if base selected above)

You can "drag" the object into position on the screen.  To do this,
designate a reference point on the object in response to the
"Base point..." prompt, and then reply "DRAG" to the "Second point:"
prompt.  The selected objects will follow the movements of the screen
crosshairs.  Move the objects into position and then press the pointer's
"pick" button.

To make multiple copies, respond to the "Base point" prompt with "M".
The "Base point" prompt then reappears, followed by repeated "Second point"
prompts.  When you have made all the copies you need, give a null response
to the "Second point" prompt.

See also:   Section 5.2 of the Reference Manual.
\DBLIST
The  DBLIST  command produces a complete list of the contents
of the drawing database for the current drawing.  This command
is used mostly for debugging.

Format:     DBLIST

You can use CTRL S to pause, and CTRL C to cancel the listing.
If you want to echo the listing to your printer, use CTRL Q.

See also:   Section 5.6 of the Reference Manual.
\DDATTE
The  DDATTE  command lets you examine or change the values of a 
Block's Attributes by means of a dialogue box.  Dialogue boxes
work only with certain display drivers.

See also:   Section 9.2 of the Reference Manual.
\DDEMODES
The  DDEMODES  command lets you change various entity drawing modes
(current layer, color, linetype, elevation, and thickness) using
dialogue boxes.  Dialogue boxes work only with certain display drivers.

See also:   Section 7.14 of the Reference Manual.
\DDLMODES
The  DDLMODES  command lets you create new layers, rename existing
layers, select a different current layer, and control the visibility,
color, freeze/thaw state, and linetype assigned to existing layers, using
dialogue boxes.  Dialogue boxes work only with certain display drivers.

See also:   Section 7.13 of the Reference Manual.
\DDRMODES
The  DDRMODES  command lets you control the settings of various
drawing aids, such as Snap, Grid, and Axis, using dialogue boxes.
Dialogue boxes work only with certain display drivers.

See also:   Section 8.9 of the Reference Manual.
\DDUCS
The  DDUCS  command displays a dialogue box that provides all of the
functionality of the UCS command; you can also use it to name or rename
existing User Coordinate Systems.  Dialogue boxes work only with certain
display drivers.

See also:   Section 8.6 of the Reference Manual.
\DELAY
The  DELAY  command is used in command scripts to allow the display
to be viewed before the next command is automatically issued.  DELAY
times are designed to be approximately 1 millisecond per increment, but
are ultimately a function of the computer equipment running AutoCAD.

Format      DELAY  Delay time in milliseconds:  (number)

The larger the number, the longer the delay.

See also:   Command scripts, Section 11.1 of the Reference Manual.
\DIM
The  DIM  command enters Dimensioning mode.  The commands allowed
during Dimensioning mode are listed below.  Each may be abbreviated
to its first three characters.  A space or RETURN will repeat the 
previous DIM subcommand.

   ALIgned     - Linear dimensioning, aligned with extension line origins
   ANGular     - Angular dimensioning
   BASeline    - Continue from 1st extension line of previous dimension
   CENter      - Draw center mark or center lines
   CONtinue    - Continue from 2nd extension line of previous dimension
   DIAmeter    - Diameter dimensioning
   EXIt        - Return to normal command mode
   HORizontal  - Linear dimensioning, horizontal dimension line
   LEAder      - Draw a leader to the dimension text
   RADius      - Radius dimensioning
   REDraw      - Redraw the display
   ROTated     - Linear dimensioning at specified angle
   STAtus      - List dimensioning variables and their values
   STYle       - Switches to a new text style
   UNDo        - Erase the annotation drawn by the last dimensioning command
   VERtical    - Linear dimensioning, vertical dimension line

\
If the DIMASO dimensioning variable is "on", the linear, angular,
diameter, and radius dimensioning commands generate a single
Dimension entity, as opposed to separate lines, arcs, arrows, and
text.  The following dimensioning commands operate on existing
Dimension entities.

   UPDate      - Redraws the selected Dimension entities as directed by
                 the current settings of all dimensioning variables.
   HOMetext    - Moves the text of the selected Dimension entities back
                 to its home (default) position.
   NEWtext     - Modifies the text of the selected Dimension entities.

See also:   Section 10.1 of the Reference Manual.
\DIM1
The  DIM1  command allows you to execute one dimensioning command, and
then returns to normal command mode.

Format:     DIM1  Dim:   (enter dimensioning command)

See also:   Section 10.1 of the Reference Manual.
\DIST
The  DIST  command displays the 3D distance (in drawing units), the angle
in X-Y plane, the angle from X-Y plane, and the delta-X/Y/Z between 
two designated points.

Format:     DIST  First point:  (point)
            Second point:  (point)

If a single number is entered in response to the "First point:" prompt,
DIST displays that number in the current UNITS format.

See also:   Section 5.6 of the Reference Manual.
\DIVIDE
The  DIVIDE  command allows you to divide an entity into a specified
number of equal length parts, placing markers along the objects at 
the dividing points.

Format:     DIVIDE  Select object to divide:  (point)
            <Number of segments>/Block:

You can select a single line, arc, circle, or polyline.  If you enter a
segment count between 2 and 32767, Point entities will be placed along
the object to divide it into that number of equal segments.  You can
request a specific Block to be inserted instead of the Point entities
by responding to the second prompt with "B".  AutoCAD will ask:

            Block name to insert:
            Align block with object? <Y>
            Number of segments:

The block must currently be defined within the drawing.  If you answer
"Yes" to the "Align block?" prompt, the block will be rotated around its
insertion point so that it is drawn tangent to the object being divided.

\
After all prompts are answered, AutoCAD will divide the object, drawing
Point entities or the specified block at each junction between the equal
segments.

See also:   Section 5.3 of the Reference Manual.
\DOUGHNUT
\DONUT
The  DOUGHNUT  (or DONUT) command draws a filled circle or ring.

Format:     DOUGHNUT  Inside diameter <last>:  (value or two points)
            Outside diameter <last>:  (value or two points)
            Center of doughnut:  (enter point)

The "Center of doughnut" prompt is repeated for multiple locations of
the doughnuts.  You can "drag" the center point if you wish.  A null
response ends the DOUGHNUT command.

The  DOUGHNUT  command constructs a closed Polyline (composed of wide
arc segments) representing the specified object.  Consequently, you may
edit the resulting doughnut with PEDIT or any of the other editing
commands that operate on Polylines.  The solid-filling of doughnuts
is subject to Fill mode.

See also:   Section 4.6 of the Reference Manual.
\DRAG
\DRAGMODE
When Drag mode is on you may draw certain entities (Circles, Arcs,
Polylines, Blocks, and Shapes) dynamically, "dragging" them into
position on the screen.  Also, many of the editing commands can drag any
existing object.  Dragging is turned on by entering the word "DRAG" at
appropriate points in the command prompt sequence.

With some computer configurations, the dragging process may be time
consuming.

Format:     DRAGMODE  ON/OFF/Auto <current>:

When Drag mode is off, all "DRAG" requests are ignored, including those
embedded in menu items.  When Drag mode is on, dragging is permitted, and
"DRAG" requests are honored when appropriate.

If you set Drag mode to "Auto", dragging is enabled for every command that
supports it.  Dragging will be performed whenever possible, without the
need to enter "DRAG" each time.

See also:   Section 6.14 of the Reference Manual.
\DTEXT
The  DTEXT  command is similar to the TEXT command and begins by
prompting for the same information as the TEXT command.  However, once
you've entered the text location, height, and rotation angle, DTEXT draws
the text on the screen character by character as you enter it.  A
rectangular text cursor is displayed to help you see where you are.  You
can use the Backspace key to back up and correct typing errors.

When you finish a line of text, press the RETURN key.  The "Text:" prompt
reappears, the text cursor advances, and you can draw another line of text
below the previous line.  You can also begin a new line of text by using
your pointing device to designate a new starting point.  This terminates
the current line of text (if any), moves the text cursor to the point you
designated, and repeats the "Text:" prompt to let you start a new line.
When you are satisfied with all the new lines of text, give a null response
to the "Text:" prompt to end the DTEXT command.

DTEXT works best with left-justified text.  When you use other types of
justification, DTEXT draws the text left-justified, and performs the
requested justification when you give a null response to end the command.

See also:   TEXT command, and Section 4.10 the Reference Manual.
\DVIEW
The  DVIEW  command lets you define parallel or visual perspective views of
your drawing dynamically.  It allows you to:

   - Look at objects with true visual perspective.
   - Remove hidden lines in your drawing.
   - Position front and back clipping planes.
   - Toggle back and forth between perspective and parallel views.
   - Specify a camera point, target point, and lens length.

\
Format:     DVIEW
            Select objects:  (Select entities)
       CAmera/TArget/Distance/POints/PAn/Zoom/TWist/CLip/Hide/Off/Undo/<eXit>:

The various options are described below:

   CAmera     - Select the camera angle relative to the target.
   CLip       - Set the front and back clipping planes.
   Distance   - Set distance between camera and target, turn on perspective.
   eXit       - Exit the DVIEW command.
   Hide       - Perform hidden line removal on the selection set.
   Off        - Turn perspective off.
   PAn        - Pan drawing across the screen.
   POints     - Specify the camera and target points.
   TArget     - Select the target angle relative to the camera.
   TWist      - Set the view twist angle.
   Undo       - Undo a view subcommand.
   Zoom       - Zoom in and out on drawing.

\
If you select the "CLip" option, AutoCAD prompts:

            Back/Front/<Off>:

   Back       - Position the back clipping plane.
   Front      - Position the front clipping plane.
   Off        - Turn off front and back clipping planes.

See also:   Section 6.6 of the Reference Manual.
\DXBIN
The  DXBIN  command loads a ".dxb" ("drawing interchange binary") file into
an AutoCAD drawing.   These files have a very compact format and are mainly
for internal use by programs such as CAD/camera (tm).

Format:     DXBIN  DXB file:  (filename)

Do not type the ".dxb" file type; it is assumed.

See also:   Appendix C of the Reference Manual.
\DXFIN
The  DXFIN  command reads a Drawing Interchange File and creates or
appends a drawing from it.  If you want to DXFIN a total drawing, create
a new drawing using Main Menu task 1, and issue the DXFIN command before
drawing anything.

Format:     DXFIN  File name <default>: (name)

If AutoCAD determines that the current drawing is not empty, it prints
the message

      Not a new drawing -- only ENTITIES section will be input.

and proceeds to ignore all sections of the input file other than the
ENTITIES section.

See also:   Appendix C of the Reference Manual.
\DXFOUT
The  DXFOUT  command creates a Drawing Interchange File from the current
drawing or from selected entities in the drawing.

Format:     DXFOUT  File name <default>: (name or RETURN)
            Enter decimal places of accuracy (0 to 16)/Entities/Binary <6>:

If you respond with "E", the normal "Select objects:" prompt appears, and
you may select the set of entities to be output.  You are then again
prompted with:

            Enter decimal places of accuracy (0 to 16) <6>:

If you select the Binary option, the output is written to a binary DXF file.

See also:   Appendix C of the Reference Manual.
\EDGESURF
The  EDGESURF  command constructs a Coons surface patch from four adjoining
space curve edges.

Format:     EDGESURF
            Select edge 1:  (Select an edge)
            Select edge 2:  (Select an edge)
            Select edge 3:  (Select an edge)
            Select edge 4:  (Select an edge)

The four adjoining edges that you select may be lines, arcs, or open
2D or 3D polylines, and must touch at their endpoints to form a 
topologically rectangular closed path.  The edges may be selected in
any order; however, the first edge selected generates the M direction,
and the two edges which touch the first edge generate the N direction
of the mesh.

The system variable SURFTAB1 controls the number of tabulation lines 
generated in the M direction, while SURFTAB2 controls the number of
tabulations generated in the N direction.

See also:   Section 4.9 of the Reference Manual.
\ELEV
The  ELEV  command allows you to specify the current Elevation and Extrusion
Thickness for subsequently drawn objects.   The elevation is the Z plane on
which an object's base is drawn, while its extrusion thickness is its height
above that base elevation.  Negative thickness extrudes downward.

Format:     ELEV
            New current elevation <current>:  (RETURN or number)
            New current thickness <current>:  (RETURN or number)

See also:   Section 7.11 of the Reference Manual.
\ELLIPSE
The  ELLIPSE  command allows you to draw ellipses.

Format:     ELLIPSE  <Axis endpoint 1>/Center:  (point)
            Axis endpoint 2:  (point)
            <Other axis distance>/Rotation:

If you enter a distance to the "<Other axis distance>/Rotation" prompt,
AutoCAD interprets it as half the length of the other axis.  If you reply
with "R", the first axis is assumed major and AutoCAD prompts:

            Rotation around major axis:

The major axis is now treated as the diameter line of a circle which will
be rotated a specified amount around the axis, into the third dimension.
You can enter a rotation angle between 0 and 89.4 degrees.

If you respond to the "<Axis endpoint 1>/Center" prompt with "C", AutoCAD
prompts for the center point, and one endpoint of each axis.  The
"<Other axis distance>/Rotation:" prompt appears for this method also,
so you can specify the ellipse's rotation rather than the second axis.

\
If you have selected isometric Snap mode, ELLIPSE allows you to draw a
circle in the current isometric drawing plane.  The dialogue for this is:

          ELLIPSE  <Axis endpoint 1>/Center/Isocircle:  I
          Center of circle:  (point)
          <Circle radius>/Diameter:  (radius distance or "D")

The "Center of circle" is the center point of the original circle as
projected into the isometric drawing plane.  The radius or diameter is
the radius or diameter of the original circle as it would appear in a
face-on projection.

You may enter the radius numerically or by designating a point to "show"
AutoCAD the radius as a distance from the circle's center point.  You
can "drag" the radius if you like.

See also:   Section 4.6 of the Reference Manual.
\END
The  END  command exits the Drawing Editor (after saving the updated
version of the current drawing), and returns to the Main Menu.  If you
then wish to exit entirely, select item 0 from the Main Menu.

Format:     END

See also:   Section 3.2 of the Reference Manual.
\ERASE
The  ERASE  command lets you delete selected entities from the drawing.

Format:     ERASE  Select objects:  (select)

You can easily erase just the last object you drew by responding to
the "Select objects" prompt with "L".

The  OOPS  command can be used to retrieve the last thing you erased.

See also:   Section 5.1 of the Reference Manual.
\EXPLODE
The  EXPLODE  command replaces a block reference with copies of the
simple entities comprising the block, forms simple lines and arcs
from a polyline, forms individual lines, arrows, and text entities
from an Associative Dimension entity, or replaces a polygon mesh with
3D Face entities.

Format:     EXPLODE  
            Select block reference, polyline, dimension, or mesh:

When a Block or Dimension is exploded, the resulting image on the screen
is identical, except that the color and linetype of entities may change
due to floating layers, colors, or linetypes.  Therefore, be careful to
select the desired object.

When a polyline is exploded, any associated width or tangent information
is discarded and the resulting lines and arcs follow the polyline's
center line.

See also:   Section 5.4 of the Reference Manual.
\EXTEND
The  EXTEND  Command allows you to lengthen existing objects in a
drawing so they end precisely at a boundary defined by one or more
other objects in the drawing.

Format:     EXTEND  Select boundary edge(s)...
            Select objects:

You may use any form of entity selection to define the boundary objects.
Lines, Arcs, Circles, and 2D Polylines may serve as boundary objects.
When using a 2D Polyline as a boundary, its width information is ignored
so that objects are extended to its center line.

All the selected edges are highlighted and will remain highlighted for
the rest of the  EXTEND  command.  Next the prompt:

            Select object to extend:

appears.  Pick objects to extend by pointing to the part of the object to
be extended.  Answer with RETURN to end the command.  Lines, Arcs, and
open 2D Polylines can be extended.

See also:   Section 5.3 of the Reference Manual.
\FILES
The  FILES  command is used to gain access to disk file directories.

Format:     FILES

This invokes the File Utility menu, which displays a list of subtasks.
Using this menu, you can list the names of files on disk, delete
selected files, rename a file, or copy a file to another file.

When listing user-specified files or deleting files, you can use the "*"
and "?" wild-card characters.  "?" matches any character in that position,
and "*" matches all characters up to a period, or to the end of the name.
Thus, "*.*" means all files.

See also:   Section 3.8 of the Reference Manual.
\FILL
The  FILL  command controls whether Solids, Traces, and wide Polylines
are to be solid-filled or just outlined.

Formats:    FILL  ON/OFF <ON>:

See also:   Section 6.11 of the Reference Manual.
\FILLET
The  FILLET  command connects two lines, arcs, or circles with a smooth
arc of specified radius.  It adjusts the lengths of the original lines
or arcs so they end exactly on the fillet arc.  If the Polyline option
is used, you can apply fillets to an entire Polyline, or remove the
fillets from a Polyline.

Format:     FILLET  Polyline/Radius/<select two objects>:

   P - Fillet an entire Polyline
   R - Set the fillet radius

See also:   Section 5.3 of the Reference Manual.
\FILMROLL
The  FILMROLL  command lets you produce a file for use by the AutoShade
shaded rendering package.

Format:     FILMROLL  Enter filmroll file name <default>:

Enter the name of the filmroll file you wish to create.  The name of
the current drawing is offered as the default.  Do not include a file
type in your response; file type ".flm" is assumed.

See also:   Section 11.3 of the Reference Manual and The AutoShade user guide.
\GRAPHSCR
\TEXTSCR
The  GRAPHSCR  and  TEXTSCR  commands are provided as a convenient means
of selecting either the graphics or text screens from within menus and
scripts.

Format:     GRAPHSCR   or   TEXTSCR

See also:   Section 11.1 of the Reference Manual.
\GRID
The  GRID  command controls the display of a grid of alignment dots to assist
in the placement of objects in the drawing.

Format:     GRID  Grid spacing(X) or ON/OFF/Snap/Aspect <current>:

The various options are described below.

    Spacing(X)  - A simple number sets grid spacing in drawing
                  units.  A number followed by "X" (e.g., "2X")
                  sets the grid spacing to a multiple of the current
                  Snap resolution.  A value of zero locks the grid
                  spacing to the current Snap resolution.
    ON          - Turns grid on with previous spacing.
    OFF         - Turns grid off.
    Snap        - Locks the grid spacing to the current Snap
                  resolution (same as a spacing value of zero).
    Aspect      - Permits a grid with different
                  horizontal and vertical spacing.

See also:   Section 8.2 of the Reference Manual.
\HANDLES
The  HANDLES  command controls the assignment of handles.  A handle
is a unique number which has been permanently assigned to an entity.
When you enter the HANDLES command the current status is displayed, 
and if handles are enabled, the next handle number is displayed.

Format:     HANDLES
            Handles are disabled.
            ON/DESTROY:

The various options are described below.

    ON       - Assigns handles to every entity currently in the database
               and every entity subsequently added to the drawing.  It
               also sets the system variable HANDLES to 1.
    DESTROY  - Deletes all handles in the database.  Warning - This
               invalidates all links into the drawing from external
               databases.

See also:   Section 7.12 of the Reference Manual.
\HATCH
The  HATCH  command is used to crosshatch or pattern-fill an area.

Format:     HATCH  Pattern (? or name/U,style) <default>:

    ?     - Lists the standard hatch patterns in "acad.pat".
    name  - Name of a hatch pattern. You are prompted for a scale and
            an angle for the pattern.
    U     - Allows you to define a simple pattern on the fly. You are
            prompted for an angle, the spacing between the lines, and 
            a single or double hatch area.
    style - Defines what areas of the selected items are to be filled
            with the specified pattern.
   
                 Style codes                     Example

            N - Normal                        BRICK,N  or U,N
            O - Outermost area only           BRICK,O  or U,O
            I - Ignore internal structure     BRICK,I  or U,I

The specified parameters are remembered and are displayed as the defaults
for subsequent HATCH commands.

See also:   Section 10.2 of the Reference Manual.
\HELP
\?
The  HELP  (or "?")  command displays help information.

Formats:    HELP (or ?)
            Command name (RETURN for list):

If you reply with a command name, information about that command is
displayed.  Otherwise, the display consists of a list of valid commands,
and a brief reminder of the methods of point specification.

If the help information does not fit on one screen, AutoCAD will pause
and display:

            Press RETURN for further help.

To continue the help display, press RETURN.  If you want to cancel
the help display, enter CTRL C.

See also:   Section 3.1 of the Reference Manual.
\HIDE
The  HIDE  command eliminates "hidden" lines.  When the VPOINT command is
used to generate a 3D view, it is in "wire frame" form; that is, all
lines are drawn, even those that would be hidden by other objects.  HIDE,
which has no parameters, regenerates the drawing with the "hidden" lines
suppressed.

Format:     HIDE

See also:   Section 6.6 of the Reference Manual.
\ID
The  ID  command displays the coordinates of a designated point
in the drawing.

Format:     ID  Point:  (point)

See also:   Section 5.6 of the Reference Manual.
\IGESIN
The  IGESIN  command reads an IGES ASCII format file and creates a
drawing from it.  Create a new drawing using Main Menu task 1, and
issue the IGESIN command before drawing anything.

Format:     IGESIN  File name: (name)

See also:   Appendix C of the Reference Manual.
\IGESOUT
The  IGESOUT  command creates a IGES ASCII format file from the
current drawing.

Format:     IGESOUT  File name: (name)

See also:   Appendix C of the Reference Manual.
\INSERT
The  INSERT  command inserts one occurrence of a defined Block into the
current drawing at a designated point, applying scale factors and
rotation.  If the named Block is not defined in the current drawing, but
another drawing exists with that name, a Block Definition is first
created from the other drawing.

Format:     INSERT  Block name (or ?) <default>:
            Insertion point:
            X scale factor <1> / Corner / XYZ:
            Y scale factor (default = X):
            Rotation angle <0>:

The X/Y scales may be specified simultaneously by using the insertion point
as the lower left corner of a box, and a new point as the upper right corner;
just enter the new point in response to the "X scale factor" prompt.

You can enter "DRAG" to dynamically specify the insertion point, X/Y scales,
and rotation angle.  You can preset the scale and rotation for the dragged 
image by using the "Scale" or "Rotate" option at the "Insertion point:" 
prompt.

\
Normally, the Block is inserted as a single entity.  However, if you precede
the Block name with a "*", its individual components are inserted.  In this
case, only one scale factor is requested.

Entering "XYZ" after the "X scale factor" prompt tells AutoCAD that you
want to specify all three scale factors, X, Y, and Z.

Format:     INSERT  Block name (or ?) <default>:
            Insertion point:
            X scale factor <1> / Corner / XYZ:  XYZ
            X scale factor <1> / Corner:
            Y scale factor (default = X):
            Z scale factor (default = X):
            Rotation angle <0>:

If the Block has Attributes, prompts for the Attribute values will appear
next.  If system variable ATTDIA is set nonzero and the display driver
has the needed features, a dialogue box will serve this purpose instead.

\
When dragging a Block into position, the default scale of 1 and default
rotation of 0 degrees are used for the drag image.  If you know the
scale or rotation beforehand, you can enter one of the following
options when the "Insertion point:" prompt is issued, to "preset" the
scale or rotation for the drag image.

    Scale   - Presets (uniform) scale factor
    XScale  - Presets X scale factor
    YScale  - Presets Y scale factor
    ZScale  - Presets Z scale factor
    Rotate  - Presets rotation amount

If you've specified one of these options, the corresponding prompt that
normally follows entry of the insertion point will be skipped.
(Variations of these options, with a leading "P", can be used to affect
only the drag image, issuing the scale and rotation prompts as usual
after the insertion point has been established.)

See also:   Section 9.1 of the Reference Manual.
\ISOPLANE
The  ISOPLANE  command permits selection of the current drawing plane
(top, left, or right) when the Isometric snap style is in effect.

Format:     ISOPLANE  Left/Top/Right/(Toggle):

   Left    - Plane defined by 150 and 90 degree axis pair
   Top     - Plane defined by 30 and 150 degree axis pair
   Right   - Plane defined by 30 and 90 degree axis pair
   RETURN  - Toggles to the next plane in a circular fashion

See also:   Section 8.5 of the Reference Manual.
\KEYS
\TOGGLES
The following control keys are used to toggle various modes on and off.

   CTRL B  - Snap mode on/off
   CTRL D  - Coordinate display control.  Static, dynamic with
             length<angle, dynamic with coordinates only.
   CTRL E  - Circular toggle of ISO plane
   CTRL G  - Grid on/off
   CTRL O  - Ortho mode on/off
   CTRL Q  - Printer echo on/off
   CTRL T  - Tablet mode on/off

See also:   Section 8.11 of the Reference Manual.
            Chapter 2 of your Installation Guide.
\LAYER
The  LAYER  command allows you to control which drawing layer you are
currently drawing on, and which drawing layers are to be displayed.  It
also controls the color and linetype associated with each drawing layer.

Format:     LAYER  ?/Make/Set/New/ON/OFF/Color/Ltype/Freeze/Thaw:

   ? wildname          -  List layers, with states, colors and linetypes
   Make name           -  Create a new layer and make it current
   Set name            -  Set current layer
   New name,name       -  Create new layers
   ON wildname         -  Turn on specified layers
   OFF wildname        -  Turn off specified layers
   Color c wildname    -  Assign color "c" to specified layers
   Ltype x wildname    -  Assign linetype "x" to specified layers
   Freeze wildname     -  Completely ignore layers during regeneration
   Thaw wildname       -  "Unfreeze" specified layers
   Ltype ?             -  List loaded linetypes

Where "wildname" appears above, the layer name(s) may include "*" and "?"
wild cards.  A single "*" selects all existing layers.

See also:   Section 7.7 of the Reference Manual.
\LIMITS
The  LIMITS  command allows you to change the upper and lower limits
of the drawing area while working on a drawing, and to turn limits
checking ON or OFF.

Format:     LIMITS
            ON/OFF/<Lower left corner> <current>:
            Upper right corner <current>:

See also:   Section 3.5 of the Reference Manual.
\LINE
The  LINE  command allows you to draw straight lines.  You can specify the
desired endpoints using either 2D or 3D coordinates, or a combination.  If
you enter 2D coordinates, AutoCAD uses the current elevation as the Z
component of the point.

Format:     LINE  From point:  (point)
            To point:  (point)
            To point:  (point)
            To point:  ...RETURN to end line sequence

To erase the latest line segment without exiting the LINE command,
enter "U" when prompted for a "To" point.

You can continue the previous line or arc by responding to the
"From point:" prompt with a space or RETURN.  If you are drawing
a sequence of lines that will become a closed polygon, you can
reply to the "To point" prompt with "C" to draw the last segment
(close the polygon).

Lines may be constrained to horizontal or vertical by the ORTHO command.

See also:   Section 4.1 of the Reference Manual.
\LINETYPE
You can control the dot-dash linetype of each entity individually,
or by layer.  To change the linetype of existing objects, use the
CHANGE  command.  To control layer linetypes, use the  LAYER  command.

The  LINETYPE  command sets the linetype for new entities.  It
can also load linetype definitions from a library file, write new
definitions to a library file, and list the linetype definitions in a
library file.

Format:     LINETYPE  ?/Create/Load/Set:

   ?      - Lists the linetypes defined in a specified library file.
   Create - Allows creation of a new linetype and stores it in a specified
            library file.
   Load   - Loads selected linetypes from a specified library file.
   Set    - Sets the current linetype used for newly drawn entities.

Note:  The "Set" option and The "LAYER Ltype" command automatically load
linetypes from the standard linetype library file.  The "Load" option
is needed only if you are storing linetypes in a different library file.

\
The LINETYPE command's "Set" option establishes the current linetype
for new entities.

Format:     LINETYPE   ?/Create/Load/Set:  S
            New entity linetype (or ?) <current>:

You can reply with a linetype name (not necessarily loaded yet), in which
case all new objects you draw will be given this linetype, regardless of
which layer is current, until you again use "LINETYPE Set".

If you respond with "BYLAYER", new objects you draw will inherit the
linetype assigned to the layer upon which they are drawn.

If you respond with "BYBLOCK", new objects will be drawn with the CONTINUOUS
linetype until they are grouped into a Block.  Then, whenever that block is
inserted, the objects will inherit the linetype of the Block insertion.

Finally, if you respond with "?", the currently loaded linetypes will
be listed.

See also:   Section 7.9 of the Reference Manual.
\LIST
The  LIST  command displays database information about selected
objects.

Format:     LIST  Select objects:  (select)

If the listing is lengthy, you can use CTRL S to pause momentarily,
or CTRL C to abort the listing.  To echo the listing to your printer,
use CTRL Q.

See also:   Section 5.6 of the Reference Manual.
\LOAD
The  LOAD  command is used to load Shape definitions from a library file.

Format:     LOAD  Name of shape file to load (or ?):  (Shape file name)

No file type should be specified; type ".shx" is assumed.

If you respond to the LOAD command's prompt with "?", AutoCAD will
display a list of the currently-loaded Shape files.

See also:   Section 4.11 of the Reference Manual.
\LTSCALE
The  LTSCALE  command governs the global scale factor for linetype dash
lengths.

Format:     LTSCALE  New scale factor <current>:

See also:   Section 7.10 of the Reference Manual.
\LTYPE
There is no  LTYPE  command; see  LAYER  and  LINETYPE.

See also:   Sections 7.7 and 7.9 of the Reference Manual.
\MEASURE
The  MEASURE  command allows you to measure an entity, placing
markers along the object at intervals of the specified distance.

Format:     MEASURE  Select object to measure:  (point)
            <Segment length>/Block:

You can select a single line, arc, circle, or polyline.  If you enter a
segment length, the object is measured into segments of that length,
starting at the endpoint closest to the point by which the entity was
selected.  Point entities will be placed where each pair of segments meet.
You can request a specific Block to be inserted instead of the Point
entities by responding to the second prompt with "B".  AutoCAD will ask:

            Block name to insert:
            Align block with object? <Y>
            Segment length:

The block must currently be defined within the drawing.  If you answer
"Yes" to the "Align block?" prompt, the block will be rotated around its
insertion point so that it is drawn tangent to the object being measured.

\
After all prompts are answered, AutoCAD will measure the object,
drawing Point entities or the specified block where each pair of
segments meet.

See also:   Section 5.3 of the Reference Manual.
\MENU
The  MENU  command is used to load a new set of commands into the
screen, tablet, and button menus from a disk file.

Format:     MENU
            Menu file name or . for none <current>:

If you give a null response, the current menu file is reloaded.  If
you respond with ".", the current menu will be cleared and no menu
file will be loaded.

See also:   Section 3.7 of the Reference Manual.
\MINSERT
The  MINSERT  command is very similar to the INSERT command in that it is
used to insert a Block.  However, the  MINSERT  command creates multiple
instances of the block in a rectangular pattern, or array.

During the  MINSERT  command, AutoCAD asks the same questions as for the
INSERT command (insert point, X/Y scaling, rotation angle, etc.).
"MINSERT *" is not permitted, however.  Following the standard INSERT
prompts, the  MINSERT  command will prompt:

    Number of rows (---):
    Number of columns (|||):
    Unit cell or distance between rows (---):  (if row count is
                                                2 or more)

    Distance between columns (|||):  (if column count is 2 or more
                                      and unit cell was not selected)

The Unit cell allows you to designate two opposite corners of a rectangle
to "show" AutoCAD the row and column spacing in one operation.

You cannot EXPLODE a MINSERT.  See also INSERT and ARRAY.

See also:   Section 9.1 of the Reference Manual.
\MIRROR
The  MIRROR  command allows you to mirror selected entities in your
drawing.  The original objects can be deleted (like a MOVE) or retained
(like a COPY).

Format:     MIRROR  Select objects: (select)
            First point of mirror line: (point)
            Second point: (point)
            Delete old objects? <N> (Yes, No, or RETURN)

The mirror line you designate is the axis about which the selected objects
are mirrored; it may be at any angle.

Often, you will want to reflect a section of a drawing but keep all its
annotation readable the usual way.  AutoCAD permits this through the
MIRRTEXT system variable.  When MIRRTEXT is set to 1 (the default value),
text will be reflected normally and will be mirror-inverted.  If you set
MIRRTEXT to zero (using the SETVAR command or AutoLISP), the MIRROR command
will handle text items (and Attribute entities) specially, preventing them
from being reversed or turned upside down in the mirrored image.

See also:   Section 5.2 of the Reference Manual.
\MOVE
The  MOVE  command is used to move one or more existing drawing
entities from one location in the drawing to another.

Format:     MOVE  Select objects:  (select)
            Base point or displacement:
            Second point of displacement:  (if base selected above)

You can "drag" the object into position on the screen.  To do this, 
designate a reference point on the object in response to the "Base point..." 
prompt, and then reply "DRAG" to the "Second point:" prompt.  The selected 
objects will follow the movements of the screen crosshairs.  Move the 
objects into position and then press the pointer's "pick" button.

See also:   Section 5.2 of the Reference Manual.
\MSLIDE
The  MSLIDE  command "takes a picture" of the current display, and saves
it in a slide file for later viewing with the VSLIDE command.

Format:     MSLIDE  Slide file <current>: (name)

The current drawing name is supplied as a default.

The display is redrawn as the slide is being made.

See also:   Section 11.2 of the Reference Manual.
\MULTIPLE
The  MULTIPLE  command instructs AutoCAD to repeat the next command you
enter, until cancelled by a CTRL C.  No prompt is issued when you enter
the MULTIPLE command, so you can think of it as a modifier for the next
command.  For instance:

     Command:  MULTIPLE  CIRCLE

would cause the CIRCLE command to be repeated until you enter CTRL C to
stop it.  Only the command name is repeated (not the options you may
have entered during the command).

See also:  Section 3.9 of the Reference Manual.
\OFFSET
The  OFFSET  command constructs an entity parallel to another
entity at either a specified distance or through a specified point.
You can  OFFSET  a Line, Arc, Circle, or Polyline.

Format:     OFFSET Offset distance or Through <last>:
            Select object to offset:  (point to the object)

To offset from a wide Polyline, measure the offset distance from the
center-line of the Polyline.  Once the object is selected, it is
highlighted on the screen.  Depending on whether you specified an
offset distance or selected "through point" in the original prompt, you
will receive one of the following prompts:

            Side to offset:
            Through point:

The offset is then calculated and drawn.  The selected object will be
de-highlighted and the "Select object to offset" prompt is re-issued.
RETURN exits the command.

See also:   Section 5.3 of the Reference Manual.
\OOPS
The  OOPS  command re-inserts the object or objects that were deleted
by the most recent ERASE command.

Format:     OOPS

For a general method of reversing the effect of most commands,
see the UNDO command.

See also:   OOPS command, Section 5.1 of the Reference Manual.
            UNDO command, Section 5.5 of the Reference Manual.
\ORTHO
The  ORTHO  command allows you to control "orthogonal" drawing
mode.  All lines and traces drawn while this mode is on are constrained
to be horizontal or vertical.

Formats:    ORTHO ON     - Turn orthogonal mode on.
            ORTHO OFF    - Turn orthogonal mode off.

Note:  When the Snap grid is rotated, Ortho mode rotates accordingly.
Also, if the Isometric snap style is in effect, Ortho mode is applied 
to the axis pair associated with the current ISO plane.

See also:   Section 8.4 of the Reference Manual.
\OSNAP
The  OSNAP  command is used to set "running" object snap modes.  Object
(geometric) snap allows you to designate points that are related to objects 
already in your drawing.

Format:     OSNAP  Object snap modes:

   CENter        - Center of Arc or Circle
   ENDpoint      - Closest endpoint of Line/Arc or closest corner
                   of Trace/Solid/3D Face
   INSertion     - Insertion point of Text/Block/Shape/Attribute
   INTersection  - Intersection of Lines/Arcs/Circles or corner of
                   Trace/Solid/3D Face
   MIDpoint      - Midpoint of Line/Arc or midpoint of an edge of 
                   Trace/Solid/3D Face
   NEArest       - Nearest point on Line/Arc/Circle/Point
   NODe          - Nearest Point entity (or Dimension definition point)
   NONe          - None (off)
   PERpendicular - Perpendicular to Line/Arc/Circle
   QUAdrant      - Quadrant point of Arc or Circle
   QUIck         - Quick mode (first find, not closest)
   TANgent       - Tangent to Arc or Circle

\
Use commas to separate multiple modes.  These modes can also be entered
whenever a point is requested, to override the running object snap modes.

See also:   Section 8.7 of the Reference Manual.
\PAN
The  PAN  command allows you to move the display window in any direction,
without changing its magnification.  This lets you see details that are
currently off the screen.

You can specify a relative movement, as in:

Format:     PAN  Displacement:  (relative coordinates)
            Second point:  (RETURN)

Or you can designate two points to specify the displacement you wish.

Format:     PAN  Displacement:  (point)
            Second point:  (point)

See also:   Section 6.3 of the Reference Manual.
\PEDIT
The  PEDIT  command supports numerous ways of editing 2D polylines,
3D polylines, and polygon meshes.

Format:

   PEDIT  Select Polyline:  (Select)

If you select a 2D polyline the following prompt is displayed:

   Close/Join/Width/Edit vertex/Fit curve/Spline curve/Decurve/Undo/eXit <X>:

"Close" will be replaced by "Open" if the polyline is currently closed.

These functions allow you to:

   - Open or close polylines.
   - Break polylines into pieces or join pieces into polylines.
   - Change the width and/or taper of the polyline or specific segments.
   - Move existing vertices or insert new ones.
   - Fit curves to the line or remove curves and kinks.

\
The PEDIT command's "Edit vertex" option causes an "X" to appear at the
polyline's first vertex and displays the following suboption prompt:

     Next/Previous/Break/Insert/Move/Regen/Straighten/Tangent/Width/eXit <N>:

   Next       - Moves "X" to the next vertex.
   Previous   - Moves "X" to the previous vertex.
   Break      - Remembers the currently marked vertex and lets you move to
                another vertex.  You can then remove the segments between
                these two vertices.
   Insert     - Adds a new vertex after the currently marked vertex.
   Move       - Lets you move the location of the current vertex.
   Regen      - Regenerates the polyline.  Used with "Width", below.
   Straighten - Remembers the currently marked vertex and lets you move to
                another vertex.  You can then replace the segments between
                these two vertices with one straight segment.
   Tangent    - Lets you attach a tangent direction to the current vertex
                for later use in curve fitting.
   Width      - Changes the starting and ending widths for the segment
                following the marked vertex.
   eXit       - Exits from vertex editing.

\
If you select a 3D polyline the following prompt is displayed:

     Close/Edit vertex/Spline curve/Decurve/Undo/eXit <X>:

"Close" will be replaced by "Open" if the polyline is currently closed.

The PEDIT command's "Edit vertex" option causes an "X" to appear at the
polyline's first vertex and displays the following suboption prompt:

     Next/Previous/Break/Insert/Move/Regen/Straighten/eXit <N>:

All of these functions perform the same function as for the 2D polylines,
except that they accept general, three dimensional points in all cases.

\
If you select a polygon mesh the following prompt is displayed:

     Edit vertex/Smooth surface/Desmooth/Mclose/Nclose/Undo/eXit <X>:

"Mclose" and "Nclose" will be replaced by "Mopen" and "Nopen" if the polygon
mesh is currently closed.

These functions allow you to:
   
   - Open or close a polygon mesh in the N and/or M direction.
   - Smooth and desmooth a polygon mesh.
   - Move existing vertices;

\
The PEDIT command's "Edit vertex" option causes an "X" to appear at the
first vertex of the mesh and displays the following suboption prompt:

     Vertex (m,n): Next/Previous/Left/Right/Up/Down/Move/REgen/eXit <N>:

   Next     - Moves the "X" to the next vertex.
   Previous - Moves the "X" to the previous vertex.
   Left     - Moves the "X" forward to the next vertex in the N direction.
   Right    - Moves the "X" backward to the next vertex in the N direction.
   Up       - Moves the "X" up to the next vertex in the M direction.
   Down     - Moves the "X" down to the next vertex in the M direction.
   Move     - Repositions the marked vertex.
   REgen    - Redisplays the polygon mesh.
   eXit     - Exits to the general mesh editing command.

See also:   Section 5.4 of the Reference Manual.
\PLAN
The  PLAN  command puts the display in PLAN view (VPOINT 0,0,1) with respect
to either the current UCS, a previously-saved coordinate system, or the
World Coordinate System.

Format:     PLAN
            <Current UCS>/UCS/World:

The various options are described below.

   Current UCS - A null response sets the display to plan view with respect
                 to the current User Coordinate System.
   UCS         - Sets the display to plan view with respect to a previously
                 saved coordinate system.
   World       - Sets the display to plan view with respect to the World
                 Coordinate System.

See also:   Section 6.6 of the Reference Manual.
\PLINE
The  PLINE  command draws Polylines.  A Polyline is a connected sequence of 
line and arc segments treated as a single entity.

Format:     PLINE  From point:  (select)
            Current line-width is nnn

Line mode:  Arc/Close/Halfwidth/Length/Undo/Width/<Endpoint of line>:

Arc mode:   Angle/CEnter/CLose/Direction/Halfwidth/Line/Radius/
            Second pt/Undo/Width/<Endpoint of arc>:

To alter an existing Polyline, use the  PEDIT  command.

See also:   Section 4.6 of the Reference Manual.
\PLOT
The  PLOT  command sends your drawing to your plotter or to a specified
file.  Chapter 13 of the Reference Manual fully documents plotting and the
PLOT and PRPLOT commands.  Plotting can also be initiated from the Main
Menu.

Format:     PLOT
            What to plot -- Display, Extents, Limits, View, or Window <D>:

In order to plot to a file, you must first configure the target plotter,
just as if you were going to send plot output directly to the plotter.
During this configuration, you will be asked if you want to write the
plot to a file and the plot file name.

See also:   Chapter 13 of the Reference Manual.
\POINT
The  POINT  command permits you to place a Point entity in the drawing.
Points are useful as "nodes" for object snap purposes.

Format:     POINT  Point:  (designate point)

The appearance of Points in your drawing is governed by the PDMODE
system variable.  A "slide" file is provided to illustrate the
various forms a point can take.  To view it, enter "VSLIDE points".

See also:   Section 4.2 of the Reference Manual.

For help on formats for entering points, use "HELP POINTS".
\POINTS
\3D
You can enter points, or coordinates, in any of the following ways:

   Absolute:  x,y
   Relative:  @deltax,deltay
   Polar:     @dist<angle

Normally, distances, points, and angles are entered as decimal numbers,
or in scientific notation.  However, you can also use the UNITS command
to specify linear values in terms of feet and inches, or angles in terms
of degrees/minutes/seconds, grads, radians, or surveyor's units.  For the
commands that accept 3D points, you can include a Z coordinate in the 
absolute and relative formats:

   Absolute:  x,y,z
   Relative:  @deltax,deltay,deltaz

If you omit the Z coordinate, the current elevation is used.

\
X/Y/Z filters can be used to compose a full point from the X, Y, and
Z components of intermediate points.  For instance, the filter ".X"
will instruct AutoCAD to use just the X coordinate of the following
point.  The Y (and possibly Z) values will then be requested.

See also:   Section 2.7 of the Reference Manual,
            Section 3.6 of the Reference Manual (UNITS command)
\POLYGON
The  POLYGON  command allows you to draw regular polygons with anywhere
from 3 to 1024 sides.  The size of the polygon may be specified by the
radius of a circle in which it is inscribed or about which it is
circumscribed, or by the length of an edge.

Format:     POLYGON  Number of sides:
            Edge/<Center of polygon>:  (enter a point)
            Inscribed in circle/Circumscribed about circle (I/C):
            Radius of circle:

If you reply with "Inscribed", you should then enter the radius of a
circle on which all the vertices of the polygon will lie.  You may
enter the radius numerically, or pick a point relative to the center
of the polygon.  If you pick a point, a vertex of the polygon will be
drawn at that point.

If you reply with "Circumscribed", you should then enter the radius of
a circle on which the midpoint of each edge of the polygon will lie.
You may enter a number or pick a point relative to the center of the
polygon.  If you pick a point, an edge midpoint will be drawn at that
point.

\
For both the Inscribed and Circumscribed cases, you can "drag" the
circle radius.  If you specify the radius numerically, the bottom
edge of the polygon will be drawn at the current Snap rotation angle.

If you reply with "Edge", you can specify the polygon by designating
the endpoints of one of its edges.  AutoCAD will then prompt:

            First endpoint of edge:
            Second endpoint of edge:

See also:   Section 4.6 of the Reference Manual.
\PRPLOT
The  PRPLOT  command causes a hard copy of the drawing to be produced on a
printer/plotter - a printer with graphics capability.  It also has the
option to send the print plot to a file for later printer plotting.
Chapter 13 of the Reference Manual fully documents plotting and the PLOT and
PRPLOT commands.  Printer plotting can also be initiated from the Main
Menu.

Format:     PRPLOT
            What to plot -- Display, Extents, Limits, View, or Window <D>:

In order to printer plot to a file, you must first configure the target
printer/plotter just as if you were going to send printer plot output
directly to the printer plotter.  During this configuration, you will be
asked if you want to write the plot to a file and the plot file name.

See also:   Chapter 13 of the Reference Manual.
\PURGE
During the course of editing a drawing, you may define Blocks, layers,
linetypes, Shape files, and Text styles that subsequently are left
unused.  The  PURGE  command allows you to discard these unused objects.

Format:     PURGE
            Purge unused Blocks/LAyers/LTypes/SHapes/STyles/All:

Reply with the object type you want to purge.  PURGE responds with the name
of each such object that is unused, and asks whether you want to purge it.

NOTE:  PURGE may be used at any time after starting to edit an existing
drawing, until you have issued a command which modifies the drawing database.

See also:   Section 3.13 of the Reference Manual.
\QTEXT
The  QTEXT  command governs "quick text" mode.  If QTEXT mode is off
(the normal case), text items are fully drawn.  If QTEXT mode is on,
only a rectangle is drawn enclosing the area of each text item.

Format:     QTEXT  ON/OFF <current>:

See also:   Section 6.13 of the Reference Manual.
\QUIT
The  QUIT  command exits from the Drawing Editor, discarding all updates
to the current drawing, and returns you to the Main Menu.  If you then
wish to exit entirely, select item 0 from the Main Menu.

Format:     QUIT  Really want to discard all changes to drawing?

If you reply with anything other than "Y" or "YES", the QUIT command
is ignored, and you can continue editing.

See also:   Section 3.2 of the Reference Manual.
\REDEFINE
\UNDEFINE
The  UNDEFINE  and  REDEFINE  commands let you override AutoCAD's
built-in commands with versions implemented in AutoLISP or via
external programs listed in the ACAD.PGP file.  For instance, to
undefine AutoCAD's QUIT command, you would enter:

       Command:  UNDEFINE  Command name:  QUIT

and to redefine it, you would enter:

       Command:  REDEFINE  Command name:  QUIT

Even if a command is undefined, you can still use it if you precede the
command name with a period, as in ".QUIT".

See also:   Appendix B of the Reference Manual.
\REDO
If  REDO  is entered immediately after a command that undoes something
(U, UNDO Back, or UNDO nnn), it will undo the Undo.  An UNDO after the
REDO will redo the original Undo.

See also:   Section 5.5 of the Reference Manual.
\REDRAW
The  REDRAW  command causes the display screen to be redrawn,
eliminating any point entry "blips" from the display.  Setting
BLIPMODE (q.v.) to OFF can suppress the drawing of "blips".

Format:     REDRAW

See also:   Section 6.8 of the Reference Manual.
\REDRAWALL
The  REDRAWALL  command performs a REDRAW in all viewports, eliminating
all point entry "blips" from each viewport.  Note: Setting BLIPMODE to
OFF will suppress the drawing of "blips".

Format:     REDRAWALL

See also:   Section 6.10 of the Reference Manual.
\REGEN
The  REGEN  command regenerates the entire drawing and redraws it on the
screen.

Format:     REGEN

See also:   Section 6.9 of the Reference Manual.
\REGENALL
The  REGENALL  command performs a REGEN in all viewports, regenerating and
redrawing the drawing in each viewport.

Format:     REGENALL

See also:   Section 6.10 of the Reference Manual.
\REGENAUTO
Some commands can change many entities at once.  The drawing must be
regenerated to reflect such a change, so some commands perform this
regeneration automatically.  The  REGENAUTO  command lets you control
whether such automatic regens are performed.

Format:     REGENAUTO  ON/OFF <current>:

If REGENAUTO is OFF and a ZOOM or PAN needs to regenerate the drawing,
you will be prompt:

      About to regen, proceed? <Y>

A "No" response aborts the PAN or ZOOM.

This message does not appear if input is coming from a menu item or a script.

See also:   Section 6.16 of the Reference Manual.
\RENAME
The  RENAME  command lets you change the names of Blocks, layers, linetypes,
Text styles, Named Views, User Coordinate Systems, and Viewport configurations
in your drawing.

Format:     RENAME  Block/LAyer/LType/Style/Ucs/VIew/VPort:  (select one)
            Old (object) name:  (old name)
            New (object) name:  (new name)

See also:   Section 3.13 of the Reference Manual.
\RESUME
The  RESUME  command may be used to return to a command script
that has been interrupted due to an error or keyboard input.

Format:     RESUME

See also:   Section 11.1 of the Reference Manual.
\REVSURF
The  REVSURF  command creates a surface of revolution by rotating a curve
path around a selected rotation axis.

Format:     REVSURF
            Select path curve:  (Select an entity)
            Select axis of rotation:  (Select an entity)
            Start angle <0>:  (Enter an angle value)
            Included angle (+=ccw, -=cw) <Full circle>: (Enter an angle value)

The path curve can be a line, arc, circle, 2D or 3D polyline.  It will
be rotated around the selected axis to define the surface.  The path  
curve defines the N direction of the mesh while the axis of revolution 
determines the M direction of the mesh.  The start angle specification
allows you to start drawing the surface of revolution at an offset from
the generating path; its default is 0.  The included angle specifies the
extent of the surface of revolution.

The system variable SURFTAB1 controls the number of tabulation lines 
generated in the M direction, while SURFTAB2 controls the number of
tabulations generated in the N direction.

See also:   Section 4.9 of the Reference Manual.
\ROTATE
The  ROTATE  command can be used to rotate existing entities.

Format:     ROTATE  Select objects:  (Do so)
            Base point:  (point)
            <Rotation angle>/Reference:

If you respond to the last prompt with a numeric angle, this is taken as
a relative angle (number of degrees) by which the selected objects will be
rotated from their current orientation, around the specified base point.
A positive angle causes counterclockwise rotation, and a negative angle
produces clockwise rotation.

If you respond to the last prompt with "Reference", you can specify the
current rotation and the new rotation you desire.  AutoCAD prompts:

            Rotation angle <0>:
            New angle:

You can even "show" AutoCAD the reference angle (by pointing to the two
endpoints of a line to be rotated), and then specify the new angle.  You
can specify the new angle by pointing or by dragging the object.

See also:   Section 5.2 of the Reference Manual.
\RSCRIPT
If a script file has been invoked using the SCRIPT command from the
Drawing Editor, an RSCRIPT command encountered in the script file causes
the script to be restarted from the beginning.

Format:     RSCRIPT

See also:   Section 11.1 of the Reference Manual.
\RULESURF
The  RULESURF  command creates a polygon mesh representing the ruled
surface between two curves.

Format:     RULESURF
            Select first defining curve:  (Pick an entity)
            Select second defining curve:  (Pick an entity)

The curves may be lines, points, arcs, circles, 2D polylines, or 3D 
polylines.  If one boundary is closed, then the other must also be 
closed.  You may use a POINT as the other boundary for either an open
or a closed curve, but both boundary curves may not be POINTS.

The ruled surface is constructed as a 2 x X polygon mesh, where X is 
the number of tabulations to be generated in the M direction (specified
by the system variable SURFTAB1), while 2 tabulations are generated in
the N direction.

See also:   Section 4.9 of the Reference Manual.
\SAVE
The  SAVE  command allows you to update your drawing on disk periodically
without exiting the Drawing Editor.

Format:     SAVE  File name:  (name or RETURN)

The current drawing file is the default output file, but you can specify
another file name explicitly.  Do not include a file type; ".dwg" is assumed.

See also:   Section 3.3 of the Reference Manual.
\SCALE
The  SCALE  command lets you change the size of existing entities.
The same scale factor is applied to X and Y dimensions.

Format:      SCALE  Select objects:  (Do so)
             Base point:  (point)
             <Scale factor>/Reference:

If you respond to the last prompt with a number, this is taken as a
relative scale factor by which all dimensions of the selected objects
will be multiplied.  To enlarge an object, enter a scale factor greater
than 1.  To shrink an object, use a scale factor between 0 and 1.

If you respond to the last prompt with "Reference", you can specify the
current length and the new length you desire.  AutoCAD prompts:

             Reference length <1>:
             New length:

You can "show" AutoCAD the reference length (by pointing to the two endpoints
of a line to be scaled), and then specify the new length.  You can specify
the new length by pointing, or by dragging the object.

See also:   Section 5.2 of the Reference Manual.
\SCRIPT
The  SCRIPT  command causes commands to be read from the specified
script file.

Format:     SCRIPT  Script file <default>: (name)

Commands are read from the script file until the end of the file
is reached, a character (preferably Backspace) is entered from the
keyboard, or a command error occurs.  If the script is terminated
early due to a command error or by keyboard entry, it may be resumed
using the  RESUME  command.

The  RSCRIPT  command can be inserted in the script file to restart the
script from the beginning.

See also:   Section 11.1 of the Reference Manual.
\SELECT
The  SELECT  command lets you designate a group of objects
as the current selection-set.  This group can be referenced
as the "Previous" selection-set in subsequent commands.

Format:     SELECT  Select objects: (do so)

See also:   Chapter 5 of the Reference Manual.
\EDIT
\INQUIRY
Most of AutoCAD's edit and inquiry commands issue a "Select objects: "
prompt.  You can point to objects on the screen to form a "selection-set"
of objects upon which the command should operate.  The following options
are available:

   (point)  =  One object
   Multiple =  Multiple objects selected by pointing
   Last     =  Last object
   Previous =  All objects in the Previous selection-set
   Window   =  Objects within Window
   Crossing =  Objects within or Crossing window
   BOX      =  Automatic Crossing (to the left) or Window (to the right)
   AUto     =  Automatic BOX (if pick in empty area) or single object pick
   SIngle   =  One selection (any type)
   Add      =  Add mode: add following objects to selection-set
   Remove   =  Remove mode: remove following objects from selection-set
   Undo     =  Undo/remove last

When you are satisfied with the selection-set as it stands, enter RETURN
(except for "Single" mode, which does not require an extra RETURN).

See also:   Section 2.9 of the Reference Manual.
\SETVAR
Many AutoCAD commands set various modes, sizes, and limits that then remain
in effect until you change them.  AutoCAD remembers these values by storing
them in a collection of "system variables".  The  SETVAR  command allows you
to examine and change these variables directly.

Format:     SETVAR  Variable name or ?:

If you answer with "?", AutoCAD flips to the text screen and displays the
names and current values of all system variables.  Some system variables
cannot be changed; these will be flagged in the output by the legend
"(read only)" following the value.  If you enter the name of a variable
that is not read-only, you will receive the prompt:

            New value for varname <current>:

where "varname" is replaced by the variable name, and "current" is the
current value of the variable.  If you respond to this prompt by
pressing RETURN or CTRL C, the variable will be left unchanged.

See also:   Section 3.11 of the Reference Manual.
\SHAPE
The  SHAPE  command inserts a defined shape into the drawing, provided that
the shape definitions have been loaded using the LOAD command.

Format:     SHAPE  Shape name (or ?) <default>:  (shape name)
            Starting point:  (point)
            Height <1.0>:  (value)
            Angle <0>:  (angle)

If you reply to the first prompt with "?", AutoCAD will list the
names of all Shapes currently loaded in the drawing.

See also:   Section 4.11 of the Reference Manual.
\SH
\SHELL
The  SHELL  command allows you to execute utility programs or 
user-supplied programs while still running AutoCAD.  The SH command
is similar, but allows only internal DOS commands to be executed.

Format:     SHELL
            DOS command:  (enter desired program name, or RETURN)

When the utility program is done, you can enter another AutoCAD command.

If you reply to the "DOS command:" prompt with RETURN, a prompt such
as "C>>" (a normal DOS prompt with an extra ">" appended) appears.  You
can now enter multiple DOS commands, just as you would at the normal
DOS prompt.  To return to AutoCAD from this mode, enter "EXIT".

NOTE:  There are some restrictions on the programs you can run from AutoCAD.

See also:   Section 3.12 of the Reference Manual.
\SKETCH
The  SKETCH  command allows you to do freehand drawings.  It requires
a pointing device such as a digitizing tablet or mouse.

Format:     SKETCH  Record increment <current>: (value)
            Sketch.  Pen eXit Quit Record Erase Connect .

Subcommands:

   P  -  Raise/lower sketching pen
   X  -  Record temporary lines, and exit Sketch
   Q  -  Discard temporary lines, and exit Sketch
   R  -  Record temporary lines, but remain in Sketch
   E  -  Erase temporary lines from a specified point to the end
   C  -  Connect:  restart sketch at last end point
   .  -  Draw line from end to current point (pen up)

See also:   Section 12.5 of the Reference Manual.
\SNAP
The "snap resolution" is the spacing of an imaginary grid of dots with which
newly designated points must align.  The  SNAP  command allows you to change
the snap resolution or to turn it off entirely for free-style drawing.

Format:     SNAP  Snap spacing or ON/OFF/Aspect/Rotate/Style <current>:

The meaning of each option is described below.

    NUMBER         - Set alignment spacing
    ON             - Align designated points
    OFF            - Do not align designated points
    ROTATE         - Rotate snap grid by specified angle, and
                     set a specified base point for the grid
    ASPECT         - Set different X/Y snap resolution
    STYLE ISO      - Set isometric snap style
    STYLE STANDARD - Set normal snap style

See also:   Section 8.1 of the Reference Manual.
\SOLID
The  SOLID  command allows you to draw solid filled regions by
entering them as quadrilateral or triangular sections.

Format:     SOLID  First point:  (point)
            Second point:  (point)
            Third point:   (point)
            Fourth point:  (point, or RETURN for triangular section)
            Third point:   (point, or RETURN to end solid)

See also:   Section 4.7 of the Reference Manual.
\STATUS
The  STATUS  command produces a report describing the current drawing
extents and the current settings of various drawing modes and parameters.

Format:     STATUS

NOTE:  In dimensioning mode, the STATUS command lists the dimensioning
variables and their current values.

See also:   Section 3.4 of the Reference Manual.
\STRETCH
The  STRETCH  command allows you to move a selected portion of a
drawing, preserving connections to parts of the drawing left in place.
Connections made with lines, arcs, traces, solids, polylines, and
3D faces may be STRETCHed.

Format:     STRETCH  Select objects to stretch by window...
            Select objects:

While you may use any of AutoCAD's forms of object selection in the
STRETCH command, you must use a window-style selection (either Crossing
or Window) at least once.  The last window specified will be the window
moved by STRETCH.  Objects may be freely added and removed from the
selection set.

\
Once the selection set is specified, STRETCH asks you:

            Base point:
            New point:

and displays a rubber band attached to the base point you enter.  After
you pick the "New point", all the chosen objects will be moved or
stretched as appropriate.

STRETCH behaves differently depending on the entity type it is examining.
Endpoints of lines which fall within the box are moved and endpoints
outside the box are left unchanged.  Arcs are handled like lines, except
that the center and start and end angles are adjusted so that the sagitta
of the arc (distance from the midpoint of the chord to the arc) is held
constant.  For traces and solids, vertices within the box are moved and
vertices outside are left unchanged.  Polylines are handled segment by
segment as if they were primitive lines or arcs.  Closed polylines are
handled properly, and width, tangent, and curve fitting information is
not modified by  STRETCH.

See also:   Section 5.2 of the Reference Manual.
\STYLE
The  STYLE  command lets you create new Text styles and modify existing
ones.  Each Text style uses a particular font, to which you can apply
a fixed height, an expansion/compression width factor, and an obliquing
(slant) angle.  You can also select backwards (mirrored right to left)
or upside-down (mirrored top to bottom) text generation.

Format:     STYLE  Text style name (or ?) <current>:  (name)
            Font file <default>:  (file name)
            Height <default>:  (value)
            Width factor <default>:  (scale factor)
            Obliquing angle <default>: (angle)
            Backwards? <N>
            Upside-down? <N>
            Vertical? <N>
            (name) is now the current text style.

The style you create or modify becomes the current text style used
for newly drawn Text entities.

See also:   Section 4.10 of the Reference Manual.
\TABLET
The  TABLET  command is used when an existing hard copy drawing is to be
"copied" with a digitizing tablet.  You can also use the TABLET command to
designate tablet menu areas and the portion of the tablet to be used as the
screen pointing area.

Formats:    TABLET ON      - Turn tablet mode on
            TABLET OFF     - Turn tablet mode off
            TABLET CAL     - Calibrate tablet to existing drawing
            TABLET CFG     - Configure tablet menus and screen pointing area

See also:   Section 12.4 of the Reference Manual.
\TABSURF
The TABSURF command creates a polygon mesh representing a general tabulated
cylinder defined by a path and a direction vector.

Format:     TABSURF
            Select path curve:  (Pick an entity)
            Select direction vector:  (Pick an entity)

The path may be a line, arc, circle, 2D polyline, or 3D polyline.  The 
surface will be drawn starting at the point of the path curve closest to
your pick point.  The direction vector may be a line, 2D polyline, or 3D
polyline.  It is determined by subtracting the endpoint of the entity 
closest to your pick point from the entity's other endpoint.

The tabulated cylinder is constructed as a 2 x X polygon mesh, where X is 
the number of tabulations to be generated in the M direction (specified
by the system variable SURFTAB1), while 2 tabulations are generated in  
the N direction.

See also:   Section 4.9 of the Reference Manual.
\TEXT
The  TEXT  command draws text of any desired size and angle.

Format:     TEXT  Start point or Align/Center/Fit/Middle/Right/Style: (point)
            Height <default>:  (value or two points)
            Rotation angle <default>:  (angle or point)
            Text:  (text string to be drawn)

If you enter a point for the "Starting point", the text is drawn
left-justified at that point.  Alternatively, you can reply:

   A - To align the text between two designated end points.
       Height and Angle are not requested in this case.
   C - To center the text around a specified point.
   F - To align the text between two designated end points with
       a specified height that varies only in its X scale factor.
   M - To center text both horizontally and vertically around a
       specified point.
   R - To right-justify the text at a designated end point.
   S - To select a different Text style.

\
AutoCAD remembers the location and style of the most recent Text item
drawn.  You can respond to the "Start point" prompt with RETURN to place
more text below the most recent text.

See also:   Section 4.10 of the Reference Manual.
\TIME
When you enter the  TIME  command, the current status of AutoCAD's time
variables is displayed, as shown below.

      Command:  TIME

      Current time:                 08 NOV 1985 at 09:10:44.005
      Drawing created:              23 JUL 1985 at 07:21:30.648
      Drawing last updated:         18 SEP 1985 at 15:33:59.771
      Time in drawing editor:       0 days 00:02:54.520
      Elapsed timer:                0 days 00:00:30.772
      Timer on.

All times are displayed to the nearest millisecond using 24-hour "military"
format, where 15:31:00 means 3:31 in the afternoon.  The  TIME command
next prompts:

\
      Display/ON/OFF/Reset:

where:

  Display -  Repeats the display shown above, with updated times.
  On      -  Starts the user elapsed timer if it was off. (default on)
  Off     -  Stops the user elapsed timer.
  Reset   -  Clears the user elapsed timer to zero.

See also:   Section 3.10 of the Reference Manual.
\TRACE
The  TRACE  command allows you to draw traces (solid-filled lines
of specified width).

Format:     TRACE  Trace width <current>:
            From point:  (point)
            To point:  (point)
            To point:  (point)
            To point:  (RETURN to end trace entry)

Traces may be constrained to horizontal or vertical by the ORTHO command.

See also:   Section 4.5 of the Reference Manual.
\TRIM
The  TRIM  command allows you to trim objects in a drawing so they
end precisely at a "cutting edge" defined by one or more other objects
in the drawing.

Format:     TRIM  Select cutting edge(s)...
            Select objects:

Lines, Arcs, Circles, and 2D Polylines (center line of Polyline) may serve
as boundary objects.  All the selected edges are highlighted and will
remain highlighted for the rest of the TRIM command.  Next the prompt:

            Select object to trim:

appears.  Select the objects to be trimmed at the previously selected
cutting edges by pointing to the part of the object to be trimmed.
Answer with RETURN to end the command.

If the selected point is between two intersections, the entity will be deleted
between the two intersection points.  2D Polylines are trimmed at their center
line.

See also:   Section 5.3 of the Reference Manual.
\U
The  U  command causes the most recent operation to be undone.  The name
of the command being undone will be displayed.  You can enter the U
command as many times as you wish, backing up one step at a time, until
the drawing is in its original state.

See also:   Section 5.5 of the Reference Manual.
\UCS
The  UCS  command is used to define or modify the current User Coordinate
System.

Format: UCS
        Origin/ZAxis/3point/Entity/View/X/Y/Z/Prev/Restore/Save/Del/?/<World>:

The options are described below:

    Del       - Deletes one or more saved coordinate systems.
    Entity    - Defines a new UCS with the same extrusion direction 
                as that of the selected entity.
    Origin    - Changes the origin of the current coordinate system.
    Prev      - Makes the previous coordinate system current.
    Restore   - Restores a saved coordinate system as the current
                system.
    Save      - Saves and names the current coordinate system.
    View      - Establishes a new coordinate system whose Z axis is
                parallel to the current view direction.

\
    World     - Sets the current UCS to equal the World Coordinate  
                System.
    X         - Rotates the current UCS around the X axis.
    Y         - Rotates the current UCS around the Y axis.
    Z         - Rotates the current UCS around the Z axis.
    ZAxis     - Defines a UCS using two points, an origin point and
                a point on the positive portion of the Z axis.
    3point    - Defines a UCS using three points, an origin point, a
                point on the positive portion of the X axis, and a
                point on the positive Y-portion of the XY plane.
    ?         - Lists the name of the current UCS, and the name, origin
                and XYZ axes for each saved coordinate system.

See also:   Section 8.6 of the Reference Manual.
\UCSICON
The  UCSICON  command is used to indicate the origin and orientation of the
current User Coordinate System.

Format:     UCSICON
            All/Noorigin/ORigin/OFF/<ON>:

The various options are described below.

    All       - Allows you to apply changes to all active viewports.
    ON        - Turns the coordinate system icon on.
    OFF       - Turns the coordinate system icon off.
    ORigin    - Forces the icon to be displayed at the origin of the current
                coordinate system.  If the origin is off screen, the icon is
                displayed at the lower left corner of the screen.
    Noorigin  - Forces the icon to be displayed at the lower left corner of
                the screen at all times.

The current icon setting can be read and controlled with the UCSICON system
variable.

See also:   Section 8.6 of the Reference Manual.
\UNDO
The  UNDO  command allows you to undo several commands at once and to perform
several special operations, such as marking a point to which you want to
return if things go wrong.  When you enter  UNDO, you get the prompt:

Format:     UNDO  Auto/Back/Control/End/Group/Mark/<Number>:

The default response is just to enter a number; this number of preceding
operations will be undone.

Mark    -  The Mark subcommand makes a special mark in the undo information,
           to which you can later back up with the Back subcommand.

Group   -  The Group and End subcommands cause a group of commands to be
End        treated as a single command for the purposes of U and UNDO.
           A Group, once Ended, is always treated as a single, indivisible
           operation.

Auto    -  The Auto subcommand requires an additional specification of ON or
           OFF.  When UNDO Auto is ON, any operation taken from the menu, no
           matter how complicated, will be treated as a single command,
           reversible by a single U command.

\
Back    -  The Back subcommand will take the drawing back to the state it was
           in when the most recent Mark subcommand was entered.

Control -  The Control subcommand allows you to limit the Undo operation or
           disable it completely.  It gives a further prompt:

                   All/None/One <All>:

           All enables the full Undo feature.  None disables the U and
           UNDO commands entirely.  A response of One limits U and UNDO
           to a single operation.  This will make very modest demands on
           disk space.

           When UNDO is entered with One mode on, the prompt is reduced to:

                   Control/ <1>:

           When UNDO is entered with None mode on, the prompt is:

                   All/None/One <All>:

See also:   Section 5.5 of the Reference Manual.
\UNITS
The  UNITS  command governs the display and input formats for coordinates,
distances, and angles.

Format:     UNITS

You can then select one of the following display/input formats for
coordinates and distances:

   Scientific          1.55E+01     (15.5 drawing units)
   Decimal             15.50                "
   Engineering         1'-3.50"             "
   Architectural       1'-3 1/2"            "
   Fractional          15 1/2               "

You can also specify the precision (the number of digits after the decimal
point, or the smallest fraction of an inch to display).

\
You can select one of the following display/input formats for angles:

   Decimal degrees   42.5
   Deg/min/sec       42d30'0.0"
   Grads             47.2222g
   Radians           0.7418r
   Surveyor's units  N 47d30'0" E

See also:   Section 3.6 of the Reference Manual.
\VIEW
The  VIEW  command can be used to associate a name with the current view
of the drawing, and to retrieve such named views.

Format:     VIEW  ?/Delete/Restore/Save/Window:  (select one)
            View name:  (name)

   ?        -  List the named views for this drawing
   Delete   -  Delete the named view
   Restore  -  Display the specified view
   Save     -  Attach "name" to current view of drawing
   Window   -  Attach "name" to specified window

See also:   Section 6.4 of the Reference Manual.
\VIEWRES
The  VIEWRES  command controls "fast zoom" mode and sets the resolution
for circle and arc generation.

Format:     VIEWRES  Do you want fast zooms? <Y>
            Enter circle zoom percent (1-20000) <100>:

If you respond to the first prompt with "N", all ZOOMs, PANs, and "VIEW
Restores" will perform regenerations, and thus run at the same speed as in
previous versions of AutoCAD.  If you respond "Y", AutoCAD will maintain a
large virtual screen for your drawing, and will perform ZOOMs, PANs, and
"VIEW Restores" at REDRAW speed whenever possible.

\
The "circle zoom percent" gives you control over the accuracy with which
circles and arcs are drawn.  Circles and arcs are drawn using many short
line segments; the more lines, the smoother the circle or arc looks.  It
takes time to compute and display these lines, however.

A "circle zoom percent" of 100 tells AutoCAD to us its internal method
of determining how many lines without alteration.  If you set it to higher
than 100, more lines than normal will be drawn for each circle and arc
whenever a REGEN occurs.  If you want circles and arcs to be composed of
fewer lines than normal (for faster drawing), you can enter a number less
than 100.

See also:   Section 6.15 of the Reference Manual.
\VPOINT
The  VPOINT  command asks you to select a 3D view point, and regenerates 
the drawing as if you were viewing it from that point.  All entities are 
drawn with the correct elevation and thickness, and projected as you would 
see them from the specified view point.                                     

Format:     VPOINT
            Rotate/<View point> <current X, Y, Z>:

If you enter RETURN in response to the "Enter view point" prompt, a
compass and axes tripod will be displayed to assist you in selecting a
view point.  A view point of 0,0,1 will return you to the normal 2D
"top" or "plan"  view.  You can also use either "VIEW RESTORE" or
"ZOOM PREVIOUS" to restore a prior view to the screen.

The "Rotate" option lets you specify the new viewpoint in terms of two
angles; one with respect to the X axis (in the XY plane) and another
with respect to the Z axis.

See also:   Section 6.6 of the Reference Manual.
\VIEWPORTS
\VPORTS
The  VIEWPORTS  (or VPORTS) command lets you divide AutoCAD's graphics
display into multiple viewports, each of which may contain a different 
view of the current drawing.

Format:     VIEWPORTS
            Save/Restore/Delete/Join/SIngle/?/2/<3>/4:
              
   Save     - Names the current viewport configuration and saves it for 
              later retrieval.
   Restore  - Replaces current viewport with named viewport configuration.
   Delete   - Removes a viewport configuration from the list of saved ones.
   Join     - Merges two viewports.
   SIngle   - Turns off multiple views and returns to a single view. The 
              single view is taken from the current active viewport.
   ?        - Lists the named and current viewport configurations.
   2        - Divides the current viewport in half.
   3        - Divides the current viewport into 3 viewports.
   4        - Divides the current viewport into 4 equal viewports.

\
Note that you may move the cursor around the screen from viewport to
viewport, but only when it is in the current viewport will it appear as a
"drawing" cursor (crosshairs, window selection box, etc.); in any other
viewport it will appear as a small arrow.  Pressing the "select" button
on your digitizer, while the cursor is in the arrow form, causes the
viewport it is in to become the new current viewport.

See also:   Section 6.7 of the Reference Manual.
\VSLIDE
The  VSLIDE  command permits viewing of a slide made by the MSLIDE command,
or of a slide from a library constructed by the SLIDELIB utility program.

Formats:    VSLIDE  Slide file: name
            VSLIDE  Slide file: library(slide-name)

The current display is replaced by the named slide.  To retrieve the
display of the current drawing, use the REDRAW command.

If you are using a command script to display a series of slides in
succession, you can overlap the time necessary to load the next slide
from disk with the viewing time of the current slide.  This is done by
preceding the file name with an asterisk.

Format:    VSLIDE  Slide file: *name

The named slide is read from disk into memory, but is not displayed
until the next VSLIDE command is executed.

See also:   Section 11.2 of the Reference Manual.
\WBLOCK
The  WBLOCK  command writes all or part of a drawing out to a disk file.

Format:     WBLOCK  File name: (output file name)
            Block name: (see below)

No file type should be specified; type ".dwg" is assumed.
The different responses to the "Block name" prompt are:

   name      - The named Block is written to the disk file.
   =         - Same as above, but the Block name is the same
               as the file name.
   *         - The entire drawing is written to disk, except for
               unreferenced Block Definitions.
   (blank)   - Permits selection of individual objects to be written
               to disk.  Also requests an insertion base point.

See also:   Section 9.1 of the Reference Manual.
\ZOOM
The  ZOOM  command magnifies the drawing on the display screen (to see more
detail) or shrinks it (to view more of the drawing with less detail).

    ZOOM number   - Magnification relative to ZOOM All display
                    (ZOOM All = ZOOM 1).  Higher numbers (like 2.5)
                    magnify, lower numbers (like 0.5) shrink.
    ZOOM numberX  - Magnification relative to current display (1X).
    ZOOM All      - Place entire drawing (all visible layers) on
                    display at once. 
    ZOOM Center   - Specify center point and new display height.
    ZOOM Dynamic  - Permits you to pan a box representing the viewing screen
                    around the entire generated portion of the drawing and
                    enlarge or shrink it in a dynamic, graphic manner.
    ZOOM Extents  - Displays current drawing content as large as possible.
    ZOOM Left     - Specify lower left corner and new display height.
    ZOOM Previous - Restores previous view.
    ZOOM Window   - Designate rectangular area to be drawn as large
                    as possible.

See also:   Section 6.2 of the Reference Manual.
\3DFACE
The  3DFACE  command is similar to the SOLID command, but it accepts
Z coordinates for the corner points and can generate a section of a
plane or a nonplanar figure.

Format:     3DFACE  First point:  (3D point)
            Second point:  (3D point)
            Third point:   (3D point)
            Fourth point:  (3D point, or RETURN for triangular section)
            Third point:   (3D point, or RETURN to end 3D face)

To draw a face with four points, enter the points in a clockwise
or counterclockwise fashion to avoid a "bowtie" figure.  Note that
this is different from the order expected by the SOLID command.

To make an edge of the 3D Face invisible, enter "Invisible" preceding
the first point of that edge. The "Invisible" specification must precede
any object snap modes, XYZ filters, or coordinate input for that edge.
    
3D Faces are not solid-filled.  The HIDE command considers them to be
opaque if they are planar.  If nonplanar, HIDE draws a "wireframe"
representation.

See also:   Section 4.8 of the Reference Manual.
\3DMESH
The  3DMESH  command allows you to define a three-dimensional polygon
mesh by specifying its size (in terms of M and N) and the location of
each vertex in the mesh.  Vertices may be specified as 2D or 3D points.
The total number of vertices to be specified will equal N times N.

Format:      3DMESH
             Mesh M size:  (Enter a value)
             Mesh N size:  (Enter a value)
             Vertex (m,n): (Select a point)

Vertices may be located at any distance relative to one another.
After all vertices have been specified, AutoCAD draws the mesh.

Polygon meshes created by the 3DMESH command are always open in both
the M and N directions.  You may close the mesh in either or both
directions by editing it with the PEDIT command.

See also:   Section 4.9 of the Reference Manual.
\3DPOLY
The  3DPOLY  command creates a general, three dimensional polyline.  A
3D polyline consists entirely of straight line segments connecting the 
vertices of the polyline.  You can supply 3D (x,y,z) coordinates for any
or all of these vertex locations.  Arc segments, width, taper, and other 
attributes of 2D polylines are not supported.

Format:      3DPOLY  First point:  (Select a point) 
             Close/Undo/<Endpoint of line>:

    Close             - Close the polyline back to the first point.
    Undo              - Delete the last segment entered.
    Endpoint of line  - Specify a point.

Pressing RETURN or the space bar ends the 3D polyline at the last endpoint.
If you wish to edit the 3D polyline, use the PEDIT command.

See also:   Section 4.6 of the Reference Manual.
