Previously, visual cross-sections had to be promoted to geometry before curves could be fitted to them. Now, when clicking on a visual cross-section from within Curve Edit > Fit Curve, the following happens:

1. The visual section is automatically promoted to section data, using tolerance settings from the Promote tool in the Cross Section Editor.
2. A NURBS curve is fitted to the section data, and its construction history is connected to the section data (and not to the surface, mesh, or visual section).
3. The fitted curve and the promoted section data are grouped.
4. The section data is templated.

You can modify the inputs (degree, spans, and so on), just as with any other fitted curve.

If you click Reset after fitting a curve, the curve and the templated section data are both deleted.

If you exit the tool, the fitted curve has construction history linked to the section data. You can choose Query Edit, then select the curve to re-enter the Fit Curve tool as usual.

If the construction history is removed, the templated section data stays behind.