The Layers dialog Adjust
menu includes commands for processing the entire image. Most commands
open a modal dialog with a Preview option, but Auto Levels and Invert
have no parameters and take effect immediately.
Opens a dialog with controls
for adjusting the following settings:
the brightness (value) of the entire layer. The highest value, 100, makes
the layer completely white, while the lowest value, -100, makes
the contrast of the layer. Higher values tend to result in fully
saturated colors, bright whites, and deep blacks, while lower values tend
toward an overall gray tone.
- HueRotates areas
of colors through the color spectrum. Does not affect shades of
gray (including black and white).
values tend toward “purer,” or brighter colors, while lower values
tend toward shades of gray.
The Levels controls in Viewport
Canvas work the same as the Levels controls in most paint programs.
mainly the darkest areas in the image. Raising the Black level makes the
overall image tend to become black.
mainly the brightest areas in the image. Lowering the White level
makes the overall image tend to become white.
- Mid Tones OffsetAffects
mainly the areas in the image that are not black or white. Raising the
Mid Tones level makes the image tend to become black, while lowering
it makes the image tend to become white.
- Color Balance
Adjusts the overall coloration
of the image.
- Cyan - RedAdjusts
the image color between cyan and red.
- Magenta - GreenAdjusts
the image color between magenta and green.
- Yellow - BlueAdjusts
the image color between yellow and blue.
whether the color adjustments affect the darker, in-between, or
lighter portions of the image.
- Auto Levels
Attempts a “best-fit” adjustment
of the image brightness, contrast, saturation, and color balance.
Converts the color of each
pixel to its spectral opposite by subtracting the RGB values from
255. So, for example, red becomes aqua (blue-green), blue becomes yellow,
and so on.