To Create a Curve on Facets
1. Click Restyle > Curve > On Facet.
2. Select points on the facet model for the curve to pass through and middle-click. Restyle creates a curve that passes through the selected points on facets. Even when you modify this curve, the curve on facets remains on the facets.
The resulting number of points that define the curve on facets may be higher than the actual selected points. The system adjusts the number of points to keep the curve as close to the facet model as possible.