# DATALINKNOTIFY System Variable [GstarCAD 2027](Help%20System/GSTARCAD/2027/Index.md) → [System Variables](Help%20System/GSTARCAD/2027/System%20Variables/(System%20Variables).md) **Function Description:** The DATALINKNOTIFY system variable is used to control the notify about updating or missing data links. | | | | --- | --- | | Type | Integer | | Saved in | Registry | | Initial value | 2 | | Range | 0,1,2 | **System Variable Value:** **0:** forbid updating data link notification **1:** enable data link notification. Notifies users 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). It will not display balloon message notifications. **2:** enable data link notify and balloon message notifications.?Notifies users 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). It also displays a data link file change notification in the area of the drawing where the data link requires updating. --- [Original help](https://www.gstarcad.net/help/GstarCAD_2027_en-US/detail/systemVariables/DATALINKNOTIFY.html) · © Gstarsoft Co., Ltd.