# Commands about Regions and Areas [GstarCAD 2027](Help%20System/GSTARCAD/2027/Index.md) → [Commands](Help%20System/GSTARCAD/2027/Commands/(Commands).md) **Commands：** - [BOUNDARY (GstarCAD 2026)](../../2026/Commands/BOUNDARY.md) - [INTERSECT (GstarCAD 2026)](../../2026/Commands/INTERSECT.md) - [MASSPROP (GstarCAD 2026)](../../2026/Commands/MASSPROP.md) - [REGION (GstarCAD 2026)](../../2026/Commands/REGION.md) - [SUBTRACT (GstarCAD 2026)](../../2026/Commands/SUBTRACT.md) - [UNION (GstarCAD 2026)](../../2026/Commands/UNION.md) **System Variables：** - [AREA (GstarCAD 2026)](Help%20System/GSTARCAD/2026/System%20Variables/AREA.md) - [DELOBJ (GstarCAD 2026)](Help%20System/GSTARCAD/2026/System%20Variables/DELOBJ.md) --- [Original help](https://www.gstarcad.net/help/GstarCAD_2027_en-US/detail/commandReferences/Commands%20about%20Regions%20and%20Areas.html) · © Gstarsoft Co., Ltd.