Insert Knot on Face
Edit
Face
Modify NURBS
Use this command to insert a knot (i.e., control
point) on a face. It modifies the base surface of the selected face. The
U and V parameter directions are displayed on the face.
Face - Select the face to modify.
Knot value/Point - If Knot value is selected, enter the value here. If Point is selected, pick a point on the face to locate the knot.
Select the parameter direction for the inserted knot.
Insert U - Insert the knot along the U direction only.
Insert V - Insert the knot along the V direction only.
Insert
U and V - Insert the knot along the U and V (i.e., the interior
of face) directions.