Intersect
Retain only the intersecting portions of one or more parts.
- 
                On the Geometry ribbon, select the Intersect tool.

Note: The tool may be hidden in a dropdown menu. To access the dropdown menu, you can do one of the following:- Click and hold the currently displayed tool (Project & Split or Slice).
 - Select 
 at the lower right corner of the
                                currently displayed tool (Project & Split or Slice). 
 - 
                In the guide bar, click 
 for more Options:
                Keep Original Parts: Turn off this option to keep only intersecting parts. - 
                Select the parts.
                Note: The parts must intersect and define a closed volume.
 - 
                To confirm the selection, and go to part selection, click
                        Apply.
                Note: To go back to part selection, in the guide bar select Back.
 - 
                In the guide bar, click 
 for more Options:
                - Automatically Create Solids: Automatically create one or more solids from the selected parts. If there are nested solids, the largest one will be created. If there is a piece inside a solid, it will be removed automatically.
 - Group Selection: To select groups of faces, turn
                            on this option. To select individual faces, turn off this option.Note: You cannot select a combination of groups of faces and individual faces by turning Group Selection on and off. When you turn off Group Selection, any previously selected faces are deselected.
 - Select Faces to Keep: Turn on this option to select the faces to keep in the next step.
 - Select Faces to Remove: Turn on this option to select the faces to remove in the next step.
 
 - Based on the option you chose in the previous step, select one or more faces to keep or remove in the intersection.
 - Click Apply.
 - Right-click and mouse through the check mark to exit, or double-right-click.