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