Activate the Deformations option to access the Skin and Morph deformation options.
         
            
               
                  
                  
               
               
                  | Option | Description | 
               
                  | Morphs | Activate this option to export all geometry Morphs used in your scene. | 
               
                  | Skins | Activate this option to export all Skin deformations used in your scene. |