1. First, we open the CAD software and draw a simple rectangle with the rectangle tool to demonstrate. As we can see, this rectangle is integrated. You can only move as a whole after selection.

2. click "modify" in the menu bar, and then select "decompose" in the drop-down menu.

3. The prompt "Select Object" appears on the screen. We click on the rectangle, right-click to confirm, and then decompose it.

4. It is a whole rectangle, so you can select each side separately and move or delete it.