Select a Morph, or a series of Morph edges that form a closed polygon (this polygon can lie on any planes in space.
On an entire Morph:
If you have closed holes in the Morph, faces are generated to cover these holes.
On a series of selected edges forming a polygon:
•A Morph face is generated.
While you can also use the Add command from the pet palette, the Generate Faces command is different because it works on any plane in space.