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DXF system variables (continued)<br />
Variable Group code Description<br />
$TDUUPDATE 40 Universal date/time of the last update/save (see “Special Handling<br />
of Date/Time Variables”)<br />
$TEXTSIZE 40 Default text height<br />
$TEXTSTYLE 7 Current text style name<br />
$THICKNESS 40 Current thickness set by ELEV command<br />
$TILEMODE 70 1 for previous release compatibility mode, 0 otherwise<br />
$TRACEWID 40 Default trace width<br />
$TREEDEPTH 70 Specifies the maximum depth of the spatial index<br />
$UCSBASE 2 Name of the UCS that defines the origin and orientation of<br />
orthographic UCS settings<br />
$UCSNAME 2 Name of current UCS<br />
$UCSORG 10, 20, 30 Origin of current UCS (in WCS)<br />
$UCSORGBACK 10, 20, 30 Point which becomes the new UCS origin after changing model<br />
space UCS to ‘BACK’ when UCSBASE is set to WORLD<br />
$UCSORGBOTTOM 10, 20, 30 Point which becomes the new UCS origin after changing model<br />
space UCS to ‘BOTTOM’ when UCSBASE is set to WORLD<br />
$UCSORGFRONT 10, 20, 30 Point which becomes the new UCS origin after changing model<br />
space UCS to ‘FRONT’ when UCSBASE is set to WORLD<br />
$UCSORGLEFT 10, 20, 30 Point which becomes the new UCS origin after changing model<br />
space UCS to ‘LEFT’ when UCSBASE is set to WORLD<br />
$UCSORGRIGHT 10, 20, 30 Point which becomes the new UCS origin after changing model<br />
space UCS to ‘RIGHT’ when UCSBASE is set to WORLD<br />
$UCSORGTOP 10, 20, 30 Point which becomes the new UCS origin after changing model<br />
space UCS to ‘TOP’ when UCSBASE is set to WORLD<br />
$UCSORTHOREF 2 If model space UCS is orthographic (UCSORTHOVIEW not equal to<br />
0), this is the name of the UCS that the orthographic UCS is relative<br />
to. If blank, UCS is relative to WORLD<br />
26 | Chapter 2 HEADER Section
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