Modify the node and tangent vector information for parametric splines.
Optimize
This command creates an optimized parametric or NURB spline, and is similar to Optimize on the Create > Spline menu. The original spline will be replaced by the optimized spline. Multiple splines can be optimized at the same time.
Untrim
Return a parametric or NURB spline that has been trimmed to its original untrimmed state.
Polygon
Display or hide the controlling polygon on a NURB spline.
Explode
Convert NURB splines to either parametric splines or polylines.
