# VIEWPORTSSYNCMODE System Variable [GstarCAD 2027](Help%20System/GSTARCAD/2027/Index.md) → [System Variables](Help%20System/GSTARCAD/2027/System%20Variables/(System%20Variables).md) → [V](Help%20System/GSTARCAD/2027/System%20Variables/V/(V).md) ## Function Description: The VIEWPORTSSYNCMODE system variable is used to control whether to display real-time preview effects in all viewports. | | | | --- | --- | | Type | Integer | | Saved in | Register | | Initial value | 0 | | Range | 0,1 | ## System Variable Value: **0:** Displays only in the active viewport. **1:** Displays real-time effects synchronously across all viewports. --- [Original help](https://www.gstarcad.net/help/GstarCAD_2027_en-US/detail/systemVariables_Vgsv/VIEWPORTSSYNCMODE.html) · © Gstarsoft Co., Ltd.