Apple MB673Z/A User Manual - Page 435

Green adjustments Move Gray Levels slider right Move White Levels slider left III Effect Adds magenta to the midtones, removing green. Adds green to the highlights, removing magenta. Adjusting the Levels of the Blue Color Channel You adjust the levels of the blue color channel when you want to remove blue and yellow color casts in the image. Before Blue Levels adjustment Blue adjustments Move Black Levels slider right Move Gray Levels slider left Move Gray Levels slider right Move White Levels slider left After Blue Levels adjustment (moved White Levels and Gray Levels sliders left) Effect Adds yellow to the shadows, removing blue. Adds blue to the midtones, removing yellow. Adds yellow to the midtones, removing blue. Adds blue to the highlights, removing yellow. Working with the Highlights & Shadows Controls You use the Highlights & Shadows adjustment controls to correct the exposure in images shot in complex lighting conditions. For example, you can use the Highlights & Shadows controls to correct the exposure of the darker areas (shadows) of an image that was otherwise correctly exposed for silhouette. You can also use the Highlights & Shadows controls to retrieve detail in extremely bright areas of an image. This is particularly useful when adjusting images of clouds, snow, or images correctly exposed for the shadow areas. Using the Highlights & Shadows controls is the best way to optimize your image's exposure in the highlights, midtones, or shadows without compromising detail in the other areas of tonality. Chapter 15 Making Image Adjustments 435