Attempts to reshape a NURBS surface so its actual shape resembles its trimmed shape.
         
         
            - Choose Surface Edit > Trim > Trim Convert
.
             
            - Click a four-sided trimmed surface.
               
Note 
                     The  tool does its best job to match the shape of the trimmed surface with an untrimmed surface. In most cases, an exact match
                        will be impossible.
                     
 
                   
                
               Tip 
                     Turn on the  and  options to attach deviation locators to the resulting surface to see how much the new surface differs from the original.