# 3DOSMODE System Variable [GstarCAD 2018](Help%20System/GSTARCAD/2018/Index.md) → [System Variables](Help%20System/GSTARCAD/2018/System%20Variables/(System%20Variables).md) → [3D](Help%20System/GSTARCAD/2018/System%20Variables/3D/(3D).md) ## Function Description: The 3DOSMODE system variable is used to control 3D object snap settings. | | | | --- | --- | | Type | Integer | | Saved in | Registry | | Initial value | 11 | | Range | 0 \~ 256 | ## System Variable Value: **1:** all 3D object snaps are disabled. **Shortcut key:** ZNON **2:** snap a vertex or a control point. **Shortcut key:** ZVER **4:**snap a middle point on a face edge. **Shortcut key:** ZMID **8:**snap the center point on a face. **Shortcut key:** ZCEN **16:** snap a knot of a spline or surface. **Shortcut key:** ZKNO **32:** snap a vertical face(planar faces only). **Shortcut key:** ZPER **64:** snap an object nearest to a face. **Shortcut key:** ZNEA **128:** snap the nearest point on planar segment of point cloud. **Shortcut key:** PNOD **256:** all 3D object snaps are disabled. **Shortcut key:** PNEA **Note：**this system variable could control which 3D object snap enabled. The setting is stored as a bitcode using the sum of listed system variable values. Users could specify more than one object snap by entering the sum of their values. Taking 6 for example, it means to specify the vertex and middle point object snaps. --- ## Other versions with matching text [GstarCAD 2016](../../../2016/System%20Variables/3D/3DOSMODE%20System%20Variable.md) · [GstarCAD 2017](Help%20System/GSTARCAD/2017/System%20Variables/3D/3DOSMODE%20System%20Variable.md) · [GstarCAD 2019](Help%20System/GSTARCAD/2019/System%20Variables/3D/3DOSMODE%20System%20Variable.md) · [GstarCAD 2020](Help%20System/GSTARCAD/2020/System%20Variables/3D/3DOSMODE%20System%20Variable.md) · [GstarCAD 2021](Help%20System/GSTARCAD/2021/System%20Variables/3D/3DOSMODE%20System%20Variable.md)