# Drawing Lock [GstarCAD 2022](Help%20System/GSTARCAD/2022/Index.md) → [User Guide](Help%20System/GSTARCAD/2022/User%20Guide/(User%20Guide).md) → [Express tool](Help%20System/GSTARCAD/2022/User%20Guide/Express%20tool/(Express%20tool).md) → [Drawing Tools](Help%20System/GSTARCAD/2022/User%20Guide/Express%20tool/Drawing%20Tools/(Drawing%20Tools).md) Sometimes a designer sends drawings to other people, but doesn't want others to modify the drawings. The LOCKUP function can turn the drawing into a whole block. You can't explode it or modify the objects of the original drawing. It is a good way to prevent others from modifying the drawing. Once the command is started, the follow wizard will be displayed:  **Select objects:** Select all the objects in the current drawing to be locked and press Enter. **Note:** Please save your drawing before using this function, because the locked drawing can't be modified.