# DGNOSNAP System Variable [GstarCAD 2018](Help%20System/GSTARCAD/2018/Index.md) → [System Variables](Help%20System/GSTARCAD/2018/System%20Variables/(System%20Variables).md) → [D](Help%20System/GSTARCAD/2018/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 --- ## Other versions with matching text [GstarCAD 2016](../../../2016/System%20Variables/D/DGNOSNAP%20System%20Variable.md) · [GstarCAD 2017](Help%20System/GSTARCAD/2017/System%20Variables/D/DGNOSNAP%20System%20Variable.md) · [GstarCAD 2019](Help%20System/GSTARCAD/2019/System%20Variables/D/DGNOSNAP%20System%20Variable.md) · [GstarCAD 2020](Help%20System/GSTARCAD/2020/System%20Variables/D/DGNOSNAP%20System%20Variable.md) · [GstarCAD 2021](Help%20System/GSTARCAD/2021/System%20Variables/D/DGNOSNAP%20System%20Variable.md) · [GstarCAD 2022](Help%20System/GSTARCAD/2022/System%20Variables/D/DGNOSNAP%20System%20Variable.md)