You
            must select a surface before you can apply media. This lets you
            apply a new media to an existing surface. You cannot apply the back
            clip to a surface. The back clip is used as the background.
         
         To apply media to a surface:
         
         
            - Select a surface by clicking one of the
               surface edges in the scene or changing to Schematic view and clicking
               the surface icon.
            
- In the Media list, select the media to
               which you want to apply a surface.
            
- Click Apply.
               The selected surface
                  is applied to the selected media.