Displays the options used in the UNDO command.
| Type: | Integer | 
| Saved in: | Not-saved | 
| Initial value: | 53 | 
The setting is stored as a bitcode using the sum of the following values:
|  
			  Value  | 
 
			  Description  | 
|---|---|
|  
			  0  | 
 
			  UNDO is turned off  | 
|  
			  1  | 
 
			  UNDO is turned on  | 
|  
			  2  | 
 
			  Only one command can be undone  | 
|  
			  4  | 
 
			  Auto is turned on  | 
|  
			  8  | 
 
			  A group is currently active  | 
|  
			  16  | 
 
			  Zoom and pan operations are grouped as a single action  | 
|  
			  32  | 
 
			  Layer property operations are grouped as a single action  |