The color balance tool modifies the color balance of the active selection or layer. Changes are not drastic. This tool is suitable to correct predominant colors in digital photos.
“Presets” are a common feature for several Colors command. You can find its description in Section 8.1, “Introduction to the “Colors” Menu”.
Selecting one of these options restricts the range of colors which are changed with the sliders or input boxes for Shadows (darkest pixels), Midtones (medium pixels) and Highlights (brightest pixels).
Sliders and range from the three RGB colors to their complementary colors (CMY). The zero position corresponds to the current level value of pixels in the original image. You can change the pixel color either towards Red or Cyan, Green or Magenta, Blue or Yellow.
This button sets color levels of the selected range back to the zero position (original values).
This option ensures that brightness of the active layer or selection is maintained. The Value of brightest pixels is not changed.
These are common features described in Section 8.1, “Introduction to the “Colors” Menu”.