You can invert the matte
            clip. Inverting the matte swaps the transparent and opaque areas
            of the matte and redefines the area of the front image that can
            be colour corrected, as well as the area of the back image that
            is shown.
         
         To invert the matte clip:
         
         
            - Click Setup in the Colour Corrector menu.
            
- Enable Invert Matte.