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CAD tip CAD tip # 4020:

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Q - question

Undocumented AutoCAD system variables.

A - answer Some AutoCAD variables are poorly documented and even not listed in the SETVAR ? command. Use these variables carefully as they are not officially supported and can be changed in future versions. You can e.g. use:
_LINFO		hardlock serial No. - only as (getvar "_LINFO")
_SERVER		network license
ENTMODS		incremented on any drawing change
GLOBCHECK	[0,1,2,3] 3=shows DCL dialog size
MILLISECS	milliseconds counter (since R2002)
NOMUTT		= 1 - mute all messages
QAFLAGS	[0 - 32767] - sum of values:
	bit 1 (1)   = ^C in menu cancels grips
	bit 2 (2)   = screen listings not paused by 'press ENTER' (e.g. good for layer exports or LIST)
	bit 4 (8)   = no "alert" boxes
	bit 8 (128) = screen picks can be used in (command)
        bit 10 (512)= sets bind type to Insert in R14
SHORTCUTMENU	add 16 (bit-value) to enable long-click functionality
SPACESWITCH	blocks paper/modelspace double-click switching
APBOX           reports the on/off status of the aperture box

You can lookup a list of all AutoCAD variables here in the section AutoCAD variables.

100% *  CAD 
16.9.2004    34005x  
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See also:
Tip 10495:Support of STEP AP242 and STPZ in Inventor 2016.
Tip 9763:Lasso - new method for selecting objects in AutoCAD 2015.
Tip 9482:Dynamically display any object property as a field.
Tip 9443:Undocumented: automatic Zoom All for Inventor views
Tip 9230:Undocumented: IFC export available also in Revit LT.

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