Enter an option [Setvars/Edvrtxs/Viewcvt/Draw/Transform/cRvsrf/eXit]:
Setvars - Sets NURBS curve display parameters.
Edvrtxs - Edits a NURBS curve.
Viewcvt - Tests the NURBS curve.
Draw - Draws the parameters of a NURBS curve.
Transform - Transforms a NURBS curve..
cRvsrf - Combines B-curves into a frame of curves on a network of S-polygons. Creates a B-surface on boundary B-curves.
Exit - Exit.