2. Click and drag to create a rectangular box. A surface is created that roughly follows the projection of the selection box on the facet data.

3. Define the mathematical properties of the surface:

a. Select a surface type.

b. In the Degree box, type or select a value from 1 to 15.

c. In the Number of segments box, type or select a value from 2 to 200.

d. Click OK to close the Surface from box dialog box.