UMAX Technologies Astra 2000U Owner's Manual page 57

UMAX Astra 2000U/P Owner's Guide
Adjusting the Image Tones
The Curve command is another way to make precise adjustments in
the highlight, midtones, or shadow levels in your images. Using
this feature corrects the gray/color values in an image. You change
the values by altering the shape of the curve that represents the
brightness values of pixels.
Click Reset to cancel the changes and return the value to the default
setting.
Adjusting the Color Balance
The Color Adjustment feature controls the hue and saturation of a
particular color.
When you click on the Color Balance tab from the Color
Adjustments panel a continuous color spectrum wheel appears.
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