All of the Colors tools are extensively described in the toolbox chapter, Section 5, “ Color Tools ”:
Section 5.1, “Color Balance”
Section 5.2, “Hue-Saturation”
Section 5.3, “Colorize”
Section 5.4, “Brightness-Contrast tool”
Section 5.5, “Threshold”
Section 5.6, “Levels”
Section 5.7, “Curves”
Section 5.8, “Posterize”
