Curve Creation Toolbar

3D Curve
See:
Curve on Surface
See Creating Free Form Curves on Surfaces
Isoparametric Curve
See Creating Associative Isoparametric Curves
Project Curve
See Projecting Curves
FreeStyle Blend Curve
See Creating Blend Curves
Styling Corner
See Creating Styling Curve Fillets
Match Curve
See Matching Curves