# Surface Edit Tools

Surface Edit Tools menu commands include items the below.

Untrim | Untrim a surface.
Detach Loop | Detach trimming curves from a face.
Split at Isocurve | Split a surface at isocurves.
Shrink Trimmed Surface | Shrink the base surface of a face to be as small as possible.
Smooth | Smooth a NURBS surface.
Negate | Negate a surface.
Insert Knots | Insert knots to a surface.
Remove Knots | Remove knots to a surface.