When
            there is not enough, or too much, black or white in a clip, it will
            lack contrast. If you want to improve the contrast by changing both
            the chroma and luma content, including the black and white points,
            use the controls in the Basics menu to adjust the shadows and highlights
            in the image.
         
         To adjust the shadows and highlights
            to improve contrast:
         
         
            - Click Basics to display the Basics menu.
            
- Enable Plot and then Ctrl-drag the cursor over the portion
               of the result clip containing black or white.
               In the Basics menu, a
                  red plot line is displayed in the 2D luma histogram indicating the
                  luma value of the sampled blacks. In the vectorscope, you can view
                  the saturation and hue.
                
- Use the 2D luma histogram and 2D vectorscope
               to determine which controls you need to use (such as the Black field,
               and Shadows and Midtones trackballs).
            
- While viewing the 2D luma histogram,
               adjust the black level to modify the luma value. The Plot sample
               is updated as you drag the field.
            
- While viewing the 2D vectorscope, drag
               the Midtones and Shadows (Highlights) trackballs towards the colour
               you want to increase in the blacks or whites. The Plot sample is
               updated as you drag the trackball.
               TipTo achieve true black
                     or white, drag the Midtones and Shadows trackball to move the plot
                     sample to the centre of the 2D vectorscope.
                   
- Continue modifying the shadows until
               you are satisfied with the result.
               TipView the sample in
                     the 3D vectorscope to make more refined modifications.