Controls the notification for updated or missing xrefs.
| Type: | Integer | 
| Saved in: | Registry | 
| Initial value: | 2 | 
|  
			  Value  | 
 
			  Description  | 
|---|---|
|  
			  0  | 
 
			  Disables xref notification  | 
|  
			  1  | 
 
			  Enables xref notification. Notifies you that xrefs are attached to the current drawing by displaying the xref icon in the status bar tray. When you open a drawing, alerts you to missing xrefs by displaying the xref icon with a yellow alert symbol (!).  | 
|  
			  2  | 
 
			  Enables xref notification and balloon messages. Displays the xref icon as in 1 above. Also displays balloon messages in the same area when xrefs are modified. The number of minutes between checking for modified xrefs is controlled by the environment variable XNOTIFYTIME.  |