Move Point enables you to change any intersection point on the surface to any other point.
To use Move Point:
The coordinates of the point are displayed.
The surface is redefined to maintain the overall smoothness of the surface so the shape is still tangent continuous.
This edit breaks the link between the surface and the method originally used to construct it. You cannot open the surface's Properties dialog and modify it based on the parameters that originally defined it as those parameters no longer apply directly to this surface.