Using the Auto Contrast command

The Auto Contrast command adjusts the overall contrast and mixture of colors in an image automatically. Because it does not adjust each color channel (red, green, and blue) individually, Auto Contrast does not introduce or remove color casts. It maps the lightest and darkest pixels in the image to white and black, which makes highlights appear lighter and shadows appear darker.

Auto Contrast can improve the appearance of many photographic or continuous-tone images. It does not improve flat-color images.

To use the Auto Contrast command:

Choose Enhance > Auto Contrast.

Making Color and Tonal Corrections > Adjusting tonal range > Using the Auto Contrast command