Adjust the tonal values and color balance of an image by setting the black point, white point, and gamma. Adjusting the levels affects the pixel distribution within an image.
Before and after adjustment applied.
Settings
Apply this adjustment via the Adjustments panel using the following settings:
Color space—select a color mode (Grey/RGB/CMYK/LAB) from the first pop-up menu.
Channels—specify a single color channel to apply the adjustment to, including the layer's alpha channel. Master (the default choice) applies the adjustment to all color channels, excluding alpha channel. Select from the second pop-up menu.
Black—determines the range of pixels in the image 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 image 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 image. 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 image 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 image.
