When you combine two or more bodies by using the “Unite” command you can remove selected regions of the bodies.

To trim bodies when combining bodies:
- Start the “Combine” command.
- Select the target body and tool body.
- Turn on the checkbox near the “Define Regions”
- To trim bodies select “Remove” in the “Region” group.
- Select volumes to remove
- The preview will be seen in the graphics window
- Click the “Ok” to create the united and trimmed body.