Creates an intersection curve between one or more selected surfaces or faces and a single plane; and turns the display of the section curvature comb on or off.. The curvature comb shows the smoothness of a curve.

Curvature combs help you determine how quickly or gradually curves change and where they change direction.  You can use the curvature comb to quickly determine the feasibility of machining and to predict the aesthetic qualities of surfaces generated from a curve.

If you have a curvature comb displayed and use dynamic edit to make changes to the curve geometry, the comb updates immediately to reflect the changes.