The functions available from the Modify>Surface submenus allow you to dramat ically alter the shape of a surface without having to recreate the surface altogether. Various surface features can be modified such as the position of surface node points and the slope angles at the node points, as well as the overall number of nodes on a surface. When editing a surface, there is a menu for specifying whether to maintain or repair the surface. With these functions, you can specify when the edits should apply to only the patches adjacent to the edited node while the rest of the surface shape is maintained, or if the entire surface should be repaired.

To view information on a feature available from the Modify>Surface submenu, click the appropriate link below:
Refit
Trim
Untrim
Break
Truncate
Extend
Match Edges
Recover