midtones, and highlights. The command converts an entire image to
shades of gray without changing the image mode.
To desaturate an image
1
Select one or more paint objects to desaturate all the images.
You can select an area in one image in edit mode to desaturate the
selected area only. If you dont make a selection, the entire image
in edit mode is affected. This command works with paint objects in
RGB Color mode, CMYK Color mode, and LAB Color mode.
2
Choose Image > Adjust > Desaturate.
Adjusting brightness and contrast
You can adjust the brightness and contrast of an entire image or spe-
cific channels with the Brightness/Contrast command. Brightness
refers to the lightness of an image. Contrast is the difference in
brightness between two pixels.
Because the Brightness/Contrast command adjusts all pixels equally,
you should avoid using it to lighten an image that appears too dark,
because the image can lose shadow detail. To preserve shadows or
highlights when adjusting the brightness of an image, you can use the
Levels or Curves commands. See Levels on page 34.689 and
Adjusting brightness curves on page 34.691.
To use the Brightness/Contrast command
1
Select one or more paint objects to adjust all the images. You
can select an area in one image in edit mode to adjust the selected
area only. If you dont make a selection, the entire image in edit
mode is affected. This command doesnt work with paint objects in
Black & White mode or Indexed mode.
2
Choose Image > Adjust > Brightness/Contrast.
3
Enter a Brightness value from -100 to 100. Higher values can
wash out midtones and shadows. Lower values can dull highlights.
4
Enter a Contrast value from -100 to 100. Increasing contrast
moves the color values of pixels to the extremes of the brightness
spectrum. Decreasing contrast moves color values toward medium
gray.
5
After entering the settings you want, click OK.