About Adjustment Layer Types

Making Color and Tonal Corrections describes in detail each type of adjustment layer. The table shows specific sections to refer to within that chapter.

Type of Correction	Adjustment Layer	For More Information
Adjust color balance	Color Balance	See Changing the Color Balance of Shadows, Midtones, and Highlights.
	Hue/Saturation/Lightness	See Adjusting the Hue, Saturation, and Lightness in Unison.
	Channel Mixer	See Adjusting the Color Channels.
Adjust brightness and contrast	Brightness/Contrast	See Manually Adjusting Brightness and Contrast.
	Curves	See Adjusting Individual Brightness Values.
	Levels	See Adjusting the Lightness Levels.
Reduce or remove colors	Invert	See Creating Negative Images.
	Threshold	See Creating Black-and-White Images.
	Posterize	See Reducing the Number of Lightness Levels.