# 3DSELECTIONMODE System Variable [GstarCAD 2026](Help%20System/GSTARCAD/2026/Index.md) → [System Variables](Help%20System/GSTARCAD/2026/System%20Variables/(System%20Variables).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 can 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. --- [Original help](https://www.gstarcad.net/help/GstarCAD_2026_en-US/detail/systemVariables/3DSELECTIONMODE.html) · © Gstarsoft Co., Ltd.