# LOCKUI System Variable [GstarCAD 2026](Help%20System/GSTARCAD/2026/Index.md) → [System Variables](Help%20System/GSTARCAD/2026/System%20Variables/(System%20Variables).md) → [L](Help%20System/GSTARCAD/2026/System%20Variables/L/(L).md) ## Function Description: The LOCKUI system variable is used to lock the location and size for tool bar and dockable windows(such as design center and property palettes). | | | | --- | --- | | Type | Bitcode | | Saved in | Registry | | Initial value | 0 | | Range | 0 ~ 15 | The locked toolbar and windows still can open or close, and add or delete items. Pressing Ctrl key to temporarily unlock. ## System Variable Value: **0:** do not lock toolbars and windows **1:** docked toolbar locked **2:** docked or anchored windows locked **4:** floating toolbars locked **8:** floating windows locked --- [Original help](https://www.gstarcad.net/help/GstarCAD_2026_en-US/detail/systemVariables_Lgsv/LOCKUI.html) · © Gstarsoft Co., Ltd.