About Slicing Mesh Elements
The Mesh Slice command enables you to slice shapes by mesh elements or a datum plane. When you slice a shape, the control mesh of a shape divides to form the control mesh of the sliced shapes. After slicing, the sliced shapes replace the original shape. The sliced shapes retain the alignment properties, but, they may lose the existing multi-level mesh changes.
You can select one of the following mesh elements to slice a shape:
One or more loops of edges
A set of connected edges with two boundary vertices
One or more faces
One or more loops of faces
Datum plane
To slice shapes using the plane, you must select a plane that intersects the shapes.