Splitting the Target Object with the Cutter Object and the Cutter Object with the
Target Object
Select Intersect > Combine.
Select the Make all regions option.
Click the objects you want to cut.Target and cutter must be the same
type of object, either both bodies or both surfaces.
Mouse over the surface to see the regions created by the cut.Because
this option can create a large number of regions, a best practice is to use
this option along with the Merge When Done option to
quickly merge all remaining regions when you click another tool or press
Esc to finish using
Combine.