# SPACESWITCH System Variable [GstarCAD 2022](Help%20System/GSTARCAD/2022/Index.md) → [System Variables](Help%20System/GSTARCAD/2022/System%20Variables/(System%20Variables).md) → [S](Help%20System/GSTARCAD/2022/System%20Variables/S/(S).md) **Function Description:** The SPACESWITCH system variable is used to control whether to access the model space by double-clicking in a layout viewport. | | | | --- | --- | | Type | Integer | | Saved in | Registry | | Initial value | 1 | | Range | 0,1 | **System Variable Value:** 0: Prevent access to model space 1: Allow access to model space