The Modify B-spline Curves toolbox contains tools edit and modify B-spline curves.

All tools in a toolbox are not always visible by default. To see all tools, right-click in the toolbox and select Show All from the menu.

To	Select in the Modify B-spline Curves toolbox
Edit the number of control points for a B-spline curve.	Edit Control Points
Change the order of a B-spline curve.	Change Curve Order
Edit the closure of a B-spline curve.	Change Curve Closure
Edit the weight of a control point on a B-spline curve.	Edit Weights
Insert or remove kinks in a B-spline curve.	Edit Kinks
Insert or remove knots in a B-spline curve.	Edit Knots
Insert or move nodes on a B-spline curve.	Edit Nodes
Minimize curvature variation in a B-spline curve.	Fair Curvature
Modify a B-spline curve using handles.	Curve Handlebar
Split a B-spline curve into segments.	Split Curve