# Drawing Tools [GstarCAD 2021](Help%20System/GSTARCAD/2021/Index.md) → [User Guide](Help%20System/GSTARCAD/2021/User%20Guide/(User%20Guide).md) → [Express tool](Help%20System/GSTARCAD/2021/User%20Guide/Express%20tool/(Express%20tool).md) - [Drawing Lock](Help%20System/GSTARCAD/2021/User%20Guide/Express%20tool/Drawing%20Tools/Drawing%20Lock.md) - [Drawing Compare](Help%20System/GSTARCAD/2021/User%20Guide/Express%20tool/Drawing%20Tools/Drawing%20Compare.md) - [Batch Purge](Help%20System/GSTARCAD/2021/User%20Guide/Express%20tool/Drawing%20Tools/Batch%20Purge.md) - [Graphic Compare](Help%20System/GSTARCAD/2021/User%20Guide/Express%20tool/Drawing%20Tools/Graphic%20Compare.md) --- Gstarsoft Co.,Ltd