Controls the notification for updated or missing data links.
| Type: | Integer | 
| Saved in: | Registry | 
| Initial value: | 2 | 
|  
			  Value  | 
 
			  Description  | 
|---|---|
|  
			  0  | 
 
			  Disables data link update notification.  | 
|  
			  1  | 
 
			  Enables data link notification. Notifies you that external data is linked to the current drawing by displaying the data link icon in the lower-right corner of the application window (the notification area of the status bar tray). Will not display balloon message notifications.  | 
|  
			  2  | 
 
			  Enables data link notification and balloon message notifications. Notifies you that external data is linked to the current drawing as in 1 above. Also displays a data link file change notification in the area of the drawing where the data link requires updating.  |