 Command entry:
Command entry: 
 Modify panel 

 Select a NURBS surface sub-object. 

 Surface Common rollout 

 Make Loft button
            
 This dialog converts a surface sub-object to a (dependent) U loft or UV loft surface. You can also change the dimension used
            to construct a U loft surface.
         
          
            Interface
            
  - From U Iso Lines
- 
                   
                     Uses curves along the surface's U dimension to construct a U loft.
                      
 
- From V Iso Lines
- 
                   
                     Uses curves along the surface's V dimension to construct a U loft. If the surface was already a U loft, set this to change
                        the lofting dimension.
                      
 
- From U and V Iso Lines
- 
                   
                     Uses curves from both the U and V dimensions to construct a UV loft.
                      
 
- U Curves
- 
                   
                     Sets the number of curves in U.
                      
 
- V Curves
- 
                   
                     Sets the number of curves in V.
                      
 
- Use Point Curves
- 
                   
                     When on, constructs the loft from point curves instead of the default CV curves. Default=off.
                      
 
- Extra Points per Segment
- 
                   
                     This control is enabled only for UV lofts (From U and V Iso Lines). Lets you increase the number of points in each segment.
                      
 
- Fuse Points
- 
                   
                     This control is enabled only for UV lofts (From U and V Iso Lines). When on, fuses points at curve intersections to ensure
                        that the U and V curves continue to intersect when you edit the surface, and that the surface remains coincident with its
                        parent curves. UV lofts constructed from intersecting curves behave more predictably. Default=on.
                      
 
- Delete Original Loft Curves
- 
                   
                     This is available only if the surface was already a U loft or UV loft. When on, Make Loft deletes the original loft curves
                        when you click OK. When off, the original curves remain where they are. Default=off.
                      
 
- Preview
- 
                   
                     When on, displays a preview of the new loft surface. Loft creation is faster when Preview is off. Default=off.