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Activating disabled System-Variables

Besides reactivated commands, LT-Extender also offers 75 reactivated system variables, which are not existing officially in AutoCAD©-LT – the most important 30 system variables are accessible from the menu.

There are many very interesting and important system variables which will effect several commands and the kind, structure and visual aspects of entities – in summary : a very nessecary and meaningful addition to those reactivated commands …

List of reactivated System-Variables which are accessible from the LT-Extender menu :


2D-3D-Draw OffsetGapType, SurfType, SurfTab1, SurfTab2, SurfU, SurfV, TraceWid, HidePrecision, Compass
ACIS DispSilh, FacetRatio, SolidCheck, AcisOutVer
M-Lines CmlJus, CmlScale, CmlStyle
XRefs BindType, XFadeCtl
Sketch SketchInc, SkPoly
Common ProxyNotice, ImageHlt, PolarMode, PsVpScale, UcsVp, DragP1, DragP2, ShpName
System TreeDepth, TreeMax, WhipThread


Alphabetical list of all reactivated System-Variables :


acadlspasdoc Controls whether AutoCAD loads the acad.lsp file into every drawing or just the first drawing opened in an AutoCAD session.
acadprefix Stores the directory path, if any, specified by the ACAD environment variable, with path separators appended if necessary.
acadver Stores the AutoCAD version number. This variable differs from the DXF file $ACADVER header variable, which contains the drawing database level number.
acisoutver Controls the ACIS version of SAT files created using the ACISOUT command.
area AREA is both a command and a system variable. The AREA system variable stores the last area computed by the AREA command. Because entering area at the Command prompt invokes the AREA command, you must use the SETVAR command to access the AREA system variable.
bindtype Controls how xref names are handled when binding xrefs or editing xrefs in place.
cmljust Specifies multiline justification.
cmlscale Controls the overall width of a multiline.
cmlstyle Sets the multiline style that AutoCAD uses to draw the multiline.
compass Controls whether the 3D compass is on or off in the current viewport.
cprofile Displays the name of the current profile.
dbmod Indicates the drawing modification status using bitcode.
diastat Stores the exit method of the most recently used dialog box.
dispsilh Controls display of silhouette curves of solid objects in Wireframe mode. Also controls whether mesh is drawn or suppressed when a solid object is hidden.
dragp1 Sets the regen-drag input sampling rate.
dragp2 Sets the fast-drag input sampling rate.
dwgcodepage Stores the same value as SYSCODEPAGE (for compatibility reasons).
facetratio Controls the aspect ratio of faceting for cylindrical and conic ACIS solids. A setting of 1 increases the density of the mesh to improve the quality of rendered and shaded models
fullopen Indicates whether the current drawing is partially open.
hideprecision Controls the accuracy of hides and shades.
imagehlt Controls whether the entire raster image or only the raster image frame is highlighted.
lastprompt Stores the last string echoed to the command line.
nomutt Suppresses the message display (muttering) when it wouldn't normally be suppressed.
offsetgaptype Controls how to offset polylines when a gap is created as a result of offsetting the individual polyline segments.
platform Indicates which AutoCAD platform is in use.
plotid Obsolete. Has no effect in AutoCAD 2000 and later releases except to preserve the integrity of pre-AutoCAD 2000 scripts and LISP routines.
plotter Obsolete. Has no effect in AutoCAD 2000 and later releases except to preserve the integrity of pre-AutoCAD 2000 scripts and LISP routines.
plquiet Controls the display of optional dialog boxes and errors for batch plotting and scripts.
polarmode Controls settings for polar and object snap tracking.
product Returns the product name.
program Returns the program name.
projectname Assigns a project name to the current drawing.
proxynotice Indicates wether to displays a notice when a proxy is created or not display a message.
psvpscale Sets the view scale factor for all newly created viewports.
refeditname Indicates whether a drawing is in reference-editing state and stores the reference file name.
screensize Stores current viewport size in pixels (X and Y).
shpname Sets a default shape name that must conform to symbol- naming conventions.
sketchinc Sets the record increment for the SKETCH command.
skpoly Determines whether the SKETCH command generates lines or polylines.
solidcheck Turns the solid validation on and off for the current AutoCAD session.
surftab1 Sets the number of tabulations to be generated for RULESURF and TABSURF commands and sets the mesh density in the M direction for REVSURF and EDGESURF command.
surftab2 Sets the mesh density in the N direction for the REVSURF and EDGESURF commands.
surftype Controls the type of surface-fitting performed by the Smooth option of the PEDIT command.
surfu Sets the surface density for PEDIT Smooth in the M direction.
surfv Sets the surface density for PEDIT Smooth in the N direction.
syscodepage Indicates the system code page specified in the acad.xmx file.
tempprefix Contains the directory name configured for placement of temporary files.
tracewid Sets the default trace width.
treedepth Specifies the maximum depth, that is, the number of times the tree-structured spatial index can divide into branches.
treemax Limits memory consumption during drawing regeneration by limiting the number of nodes in the spatial index (oct-tree).
ucsvp Determines whether the UCS in viewports remains fixed or changes to reflect the UCS of the current viewport.
undoctl Stores a bitcode indicating the state of the Auto and Control options of the UNDO command. It's the sum of the following values:
undomarks Stores the number of marks placed in the UNDO control stream by the Mark option. The Mark and Back options are not available if a group is currently active.
useri1–useri5 USERI1, USERI2, USERI3, USERI4, and USERI5 are used for storage and retrieval of integer values.
userr1–userr5 USERR1, USERR2, USERR3, USERR4, and USERR5 are used for storage and retrieval of real numbers.
users1–users5 USERS1, USERS2, USERS3, USERS4, and USERS5 are used for storage and retrieval of text string data.
whipthread Controls whether to use an additional processor (multithreaded processing) to improve the speed of operations such as ZOOM and PAN that redraw or regenerate the drawing.
worlducs Indicates whether the UCS is the same as the WCS.
writestat Indicates whether a drawing file is read-only or can be written to. For developers who need to determine write status through AutoLISP.
xfadectl Controls the fading intensity for references being edited in-place.

All system variables can be used just as commands – they can also be used like commands from inside (Arx/Lisp) programs.