# Commands about Regions and Areas [GstarCAD 2025](Help%20System/GSTARCAD/2025/Index.md) → [Commands](Help%20System/GSTARCAD/2025/Commands/(Commands).md) **Commands：** - [BOUNDARY](Help%20System/GSTARCAD/2025/Commands/BOUNDARY.md) - [INTERSECT](Help%20System/GSTARCAD/2025/Commands/INTERSECT.md) - [MASSPROP](Help%20System/GSTARCAD/2025/Commands/MASSPROP.md) - [REGION](Help%20System/GSTARCAD/2025/Commands/REGION.md) - [SUBTRACT](Help%20System/GSTARCAD/2025/Commands/SUBTRACT.md) - [UNION](Help%20System/GSTARCAD/2025/Commands/UNION.md) **System Variables：** - [AREA](../System%20Variables/AREA.md) - [DELOBJ](Help%20System/GSTARCAD/2025/System%20Variables/DELOBJ.md) --- [Original help](https://www.gstarcad.net/help/GstarCAD_2025_en-US/detail/commandReferences/Commands%20about%20Regions%20and%20Areas.html) · © Gstarsoft Co., Ltd.