Select one or more faces in the graphics window, or a feature in PathFinder.
Right-click to display the shortcut menu, then click Detach.
Tip:
You can use the steering wheel to move the detached faces or feature to another location on the model, then use the Attach command to reattach them to the model.
You can also detach faces using the Detach option on the Move command bar when you are moving or rotating faces or features.