Use the colour correction
            controls to perform many operations. You can:
         
         
            - Colour correct shadows, midtones, and
               highlights separately or together.
            
- Adjust the hue, saturation, or contrast
               of an image.
            
- Rewire the red, green, or blue channels
               of an image.
            
- Create a negative or monochrome image.
            
- Adjust the gamma of the individual red,
               green, blue, or RGB channels.
            
- Adjust the red, green, blue, or RGB values
               in an image by modifying the gain and the offset values for the
               channel.
            
- Perform colour suppression.
            
- Adjust the colour balance.
            
To reset any of these
            changes, click Reset Basics. To reset all the changes in the Colour
            Corrector, click Reset All.