Refit Face
Edit
Face
Modify
NURBS
Use this command to refit a face (i.e., modify the degrees
of freedom). This
command modifies the base surface of the selected face. The
U and V parameter directions are displayed on the face.
Select the face to refit.
Select the parameter direction to modify (U-Dir, V-Dir or Both) or pick OK to accept the current default.
Specify the number of sample points for the parameter direction (U, V or Both) selected.
Specify the degree (1-6) in the parameter direction (U, V or Both) for fitting the face.
Enter a name for the feature. If you don't enter a name one will be assigned for you.

U=6 Degree 4, V=6 Degree 4
Sensitivity
Specifies the sensitivity of curvature for sampling points. Enter the sensitivity of curvature value within the range 0-200. The default value is 50.