# 3DSELECTIONMODE System Variable [GstarCAD 2020](Help%20System/GSTARCAD/2020/Index.md) → [System Variables](Help%20System/GSTARCAD/2020/System%20Variables/(System%20Variables).md) → [3D](Help%20System/GSTARCAD/2020/System%20Variables/3D/(3D).md) **Function Description:** The 3DSELECTIONMODE system variable is used to control the selection priority of both visually and physically overlapped objects in 3D visual styles. | | | | --- | --- | | Type | Integer | | Saved in | Registry | | Initial value | 0 | | Range | 0,1 | **System Variable Value:** **0:** apply the traditional 3D selection priority **1:** apply line of sight 3D selection priority for selecting 3D solids and surfaces. In addition, this setting could also provide selection priority for a defined object which associated with surfaces. **Note:** if selected objects are in 2d wireframe or 3d wireframe styles, the 3DSELECTIONMODE system variable has no effect. --- ## Other versions with matching text [GstarCAD 2016](../../../2016/System%20Variables/3D/3DSELECTIONMODE%20System%20Variable--f15f0848e88e.md) · [GstarCAD 2017](../../../2017/System%20Variables/3D/3DSELECTIONMODE%20System%20Variable--f15f0848e88e.md) · [GstarCAD 2018](../../../2018/System%20Variables/3D/3DSELECTIONMODE%20System%20Variable--f15f0848e88e.md) · [GstarCAD 2019](../../../2019/System%20Variables/3D/3DSELECTIONMODE%20System%20Variable--f15f0848e88e.md) · [GstarCAD 2021](../../../2021/System%20Variables/3D/3DSELECTIONMODE%20System%20Variable--f15f0848e88e.md)