# Create and Modify Objects [GstarCAD 2021](Help%20System/GSTARCAD/2021/Index.md) → [User Guide](Help%20System/GSTARCAD/2021/User%20Guide/(User%20Guide).md) [Overview](Help%20System/GSTARCAD/2021/User%20Guide/Create%20and%20Modify%20Objects.md) - [Change Existing Objects](Help%20System/GSTARCAD/2021/User%20Guide/Create%20and%20Modify%20Objects/Change%20Existing%20Objects/(Change%20Existing%20Objects).md) - [Control the Properties of Objects](Help%20System/GSTARCAD/2021/User%20Guide/Create%20and%20Modify%20Objects/Control%20the%20Properties%20of%20Objects/(Control%20the%20Properties%20of%20Objects).md) - [Create and Use Blocks](Help%20System/GSTARCAD/2021/User%20Guide/Create%20and%20Modify%20Objects/Create%20and%20Use%20Blocks/(Create%20and%20Use%20Blocks).md) - [Draw Geometric Objects](Help%20System/GSTARCAD/2021/User%20Guide/Create%20and%20Modify%20Objects/Draw%20Geometric%20Objects/(Draw%20Geometric%20Objects).md) - [Use Precision Tools](Help%20System/GSTARCAD/2021/User%20Guide/Create%20and%20Modify%20Objects/Use%20Precision%20Tools/(Use%20Precision%20Tools).md)