About Modifying Analytical Surfaces
To modify an existing analytical surface, select the surface and click Restyle > Modify Shape. The analytical shape dialog box used for the creation of the surface opens. Use the required options to modify the surface. To preview the modified geometry before applying your changes, click Preview.
The Full and Domain options are not available when modifying an analytical surface.
You can modify the surface properties of any analytical surface that does not have multiple components. When the properties are modified, this surface becomes a polynomial surface.