Allows you to reshape curves and surfaces by dragging handles attached to the object.
Controls whether the ends/edges of the object are locked in their current position and shape.
Free – The endpoints/edges are free to move.
Position – The endpoints/edges are locked in their current position.
Position and tangent – The endpoints/edges as well as the first (tangent) row of CVs are locked in their current position.
Saves construction history for later editing.
