PruneKeyCreator \ Modify \ Boolean \ Prune
Use the Prune function to extract a body from a list of selected faces. The faces must be removable in order for this operation to be successful.
Prune offers two different options: Cut and Copy. Using Copy, you can create a solid body from the list of selected faces without changing the original solid. The Cut option can be used to create a solid body from the list of selected faces, while removing those faces from the original solid.
Using the Function: