# DGNOSNAP System Variable [GstarCAD 2027](Help%20System/GSTARCAD/2027/Index.md) → [System Variables](Help%20System/GSTARCAD/2027/System%20Variables/(System%20Variables).md) → [D](Help%20System/GSTARCAD/2027/System%20Variables/D/(D).md) ## Function Description: The DGNOSNAP system variable is used to determine whether to active object snap mode for geometric drawings that attached DGN reference underlay. | | | | --- | --- | | Type | Integer | | Saved in | Registry | | Initial value | 1 | | Range | 0,1 | ## System Variable Value: **0:** turn off object snap mode for geometric drawings that attached DGN reference underlay **1:** turn on object snap mode for geometric drawings that attached DGN reference underlay --- [Original help](https://www.gstarcad.net/help/GstarCAD_2027_en-US/detail/systemVariables_Dgsv/DGNOSNAP.html) · © Gstarsoft Co., Ltd.