About Creating Curves in Restyle
In Restyle, you can create curves by selecting:
Facet points.
Freely selected points on geometry including datum points, vertices, curves, surfaces, and facet data through which the curve will pass.
Points on a surface.
Borders or sharp edges of the facet feature.
A cross section of the facet feature at a datum plane.
In addition, you can also use the following tools:
Click Model > Datum > Curve, and click the following buttons:
Curve through Points—Creates datum curves through points.
Curve from Equation—Creates datum curves from an equation.
Curve from Cross Section—Creates datum curves using a cross section.
Click Model > Get Data > Import to create datum curves from a file.
For more information, refer to the Part Modeling module of Creo documentation.