Method: the method to morph surface.

Direction: the direction for moving surface .

Constraint: the geometry constraint on the picked surface point .

Position: surface will pass the position of the target point;

Keep original tangent: surface will pass the position of the target point and keep the first derivative of the point on the original surface;

Region: define the region on the surface for morphing.

Copy: copy a new surface in the database .

Annotation: display the annotation of the new point and the moving distance.

Edit: pick a surface and pick a point on the surface for moving.

Undo: undo.

Redo: redo.