Quick adjustments in the Curves dialog box

Clicking the Auto button applies either an Auto Color, Auto Contrast, or Auto Levels correction, depending on the settings in the Auto Color Correction Options dialog box. For more information on specifying the settings for Auto Color, Auto Contrast, or Auto Levels, see Setting auto color correction options (Photoshop).

The Curves dialog box also has eyedropper tools to adjust color and tonality in an image. For more information about using the eyedropper tools, see Using the eyedropper tools in the Levels or Curves dialog box.