Adjust Image Colors

• Brightness — you can make simple adjustments to the tonal range of an image. The brightness setting determines the level of light and dark shades in an image. A pure white image has maximum brightness, whereas a pure black image has minimum brightness. Brightness is distinct from contrast, which measures the range between the darkest and lightest shades in an image.
• Contrast — you can make overall adjustments to the image. The contrast setting determines the relationship between the light and dark areas of an image. A high contrast image is a black and white image with no gray shades. A low contrast image shows many midrange gray shades. An image with low contrast tends to look dull and flat.
• Highlight — you can set the highlight level for the whole image. Increasing the highlight level value lightens the light areas of your image, and decreasing the highlight value darkens them.
• Shadow — you can set the shadow level for the whole image. Increasing the shadow level value darkens the dark areas of your image, and decreasing the shadow level lightens the dark areas of your image.
• Gamma — you can set the contrast affecting the mid-level grays or midtones of an image. Adjusting the image gamma allows you to change brightness values of the middle range of gray tones without altering the shadows and highlights.

• For color images scanned in 256 Colors or True Color, RGB mode, you can adjust Brightness/Contrast and Gamma levels for the Red, Green, Blue and RGB channels; the adjustments to the RGB channel affect each of the Red, Green and Blue channels. You can adjust Highlight/Shadow levels for the RGB channel only.
• For the images scanned in Gray 256 Scales mode, you can adjust Brightness/Contrast, Highlight/Shadow and Gamma levels for the Gray channel only.
• For the images scanned in Lineart B/W or Halftone B/W mode, you cannot adjust any of the Brightness/Contrast, Highlight/Shadow and Gamma settings.