Controls whether the defined system variable list is monitored.
| Type: | Integer | 
| Saved in: | User-settings | 
| Initial value: | 1 | 
|  
			  Value  | 
 
			  Description  | 
|---|---|
| 
			  0  | 
			  System variables are not monitored.  | 
| 
			  1  | 
			  System variables are monitored. Notifications on system variable value modifications are displayed on the command line and status bar.  | 
| 
			  2  | 
			  System variables are monitored. Notifications on system variable value modifications are displayed on the command line and status bar. Balloon notifications are also displayed.  |