Change the shape of NURBS surfaces and curves by using the 3D Edit Bar or by editing control vertices.

Use the Control Vertices Edit Bar (3DEDITBAR) to drag and reshape surfaces.

A second way to edit NURBS surfaces is to drag and edit the control vertices directly. Hold the Shift key down to select multiple control vertices.

Use CVSHOW to display the control vertices for both NURBS surfaces and curves.

Drag the control vertices to reshape the curve or surface; you can also add or delete control vertices in both the U and V directions.

The typical surface modeling workflow is to:

• Create a model that combines 3D solids, surfaces, and mesh objects.
• Convert the model to procedural surfaces to take advantage of associative modeling.
• Convert the procedural surfaces to NURBS surfaces with CONVTONURBS to take advantage of NURBS editing.
• Check for imperfections and wrinkles with the surface analysis tools.
• If necessary, rebuild the surfaces to restore smoothness with CVREBUILD.