When
            working in a module that supports multiple viewports, you can monitor
            the red, green, and/or blue channels of clips, or a greyscale representation
            of any channel, in the image window.
         
         To monitor the red, green, and blue channels
            independently:
         
         
            - Display the View menu.
            
- Toggle the R, G, and B buttons in the
               Viewing area to change the display of the red, green, and blue channels,
               respectively.
            
- To monitor an exclusive greyscale representation
               of the red, green, or blue channel, enable the Exclusive button
               and then the R, G, or B button.
            
- To restore full RGB display, disable
               Exclusive, and then enable R, G, and B.