2013

Only one command can be undone2
Auto is turned on4
A group is currently active8
Zoom and pan operations are grouped as a single action16
Layer property operations are grouped as a single action32
See also:
Correct Mistakes
UNDOMARKS
Stores the number of marks placed in the UNDO control stream by the Mark
option.
(Read-only)
IntegerType:
Not-savedSaved in:
0Initial value:
The Mark and Back options are not available if a group is currently active.
See also:
Correct Mistakes
UNITMODE
Controls the display format for units.
IntegerType:
DrawingSaved in:
0Initial value:
U System Variables | 1531