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.