1. Double-click the block to enter Block Editor

Find “Save Block As” button in the Block Editor panel, shown as below,

If you are using GstarCAD Classic workspace, then a block-editing toolbar would pop up, shown as below,

Or you can just enter BSAVEAS, and press Enter key,

2. After clicking “Save Block As” button, enter the new name in the popped up Save Block As dialog box, shown as below,

What we are editing here is the definition of a new block, and we can modify current objects or add new objects. we can also close the Block Editor and insert a new a block to edit.

3. Close Block Editor

4. Enter I to insert a block, we can find the newly saved block in the list, shown as below,