The Adjust Color Curves command improves color tones in a photo by adjusting highlights, midtones, and shadows in each color channel. For example, this command can fix photos with silhouetted images resulting from strong backlighting, or slightly washed-out objects that were too close to the camera’s flash.
In the Adjust Color Curves dialog box, you can compare and choose different tonal presets by selecting from the list of styles in the Select A Style box. To fine-tune the adjustment, adjust the highlights, midtone brightness and contrast, and shadows.