Adjust the tonal values and colour balance of a design by setting the black point, white point, and gamma. Adjusting the levels affects the pixel distribution within a design.
Before and after adjustment applied.
Settings
Apply this adjustment via the Adjustments panel using the following settings:
Colour space—select a colour mode (Grey/RGB/CMYK/LAB) from the first pop-up menu.
Channels—specify a single colour channel to apply the adjustment to, including the layer's alpha channel. Master (the default choice) applies the adjustment to all colour channels, excluding alpha channel.
Black—determines the range of pixels in the design considered to be pure black. Drag to the right to include pixels in the range (thereby increasing shadows), drag to the left to exclude pixels (thereby reducing shadows).
White—determines the range of pixels in the design considered to be pure white. Drag to the left to include pixels in the range (thereby increasing highlights), drag to the right to exclude pixels (thereby reducing highlights).
Gamma—determines the distribution of mid-tone pixels in the design. Drag to the left to redistribute pixels towards the black point, drag to the right to redistribute towards the white point.
Output Black—remaps the output level of absolute black. Moving the slider to the right makes the design look more pale and washed out.
Output White—remaps the output level of absolute white. Moving the slider to the left lessens the intensity of highlights of the design.
