Click Mesh
Modeling tabMesh
Edit panelSplit
Mesh Face. At the Command prompt,
enter meshsplit.
Press Ctrl+click the mesh face that you
want to split.
NoteIf you cannot select
a face, verify whether subobject selection filtering is turned on
for a different subobject type. (Right-click in the drawing area and
click Subobject Selection Filter.)
Click the location on the edge where
you want to start the split.
Click the location on the edge where
you want to end the split.
The mesh face is split
along the boundary you specified. Surrounding faces are adjusted
along the new faces.