UNDOCTL system variable

Function Description:

The UNDOCTL system variable is used to display options used in UNDO command.
(Read-Only)

Type : Integer
Saved in : Not saved
Initial value : 53

The setting is stored as a bitcode using the sum of listed system variable values.

System Variable Value:

0 : turn off UNDO
1 : turn on UNDO
2 : only one command could be undone
4 : only one command could be undone
8 : one group is active
16 : treat ZOOM and PAN as one single action
32 : treat ZOOM and PAN as one single action