This modifier uses a Color Tone Function to allows you to adjust color levels on different ranges of the color Tone.
                          The same effect of discriminative color adjustments can be done in a more versatile but less practical with any 
                    Color Modifiers
                    Change pixels color
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                     masked by a 
                    Color mask
                    Select each pixel depending on its color
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                     set as a Tone Balance color selector.
      
                    
