Xerox DocuColor 252 User Manual page 158

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This button:
Before/After view
Before/After view
Brightness and Contrast Slider Controls
The Brightness and Contrast slider controls are active only when all of the
separations are selected.
Brightness
Brightness increases or decreases the luminance of the image. Increasing brightness
brightens the image and results in a concave curve. Decreasing brightness darkens
the image and results in a convex curve.
Move the Brightness slider to the right to increase brightness or to the left to
decrease brightness.
Contrast
Contrast increases the image contrast by making the highlights lighter and the
shadows darker. It can also be used to decrease the contrast.
Move the Contrast slider to the right to increase contrast (S shaped curve), or to
the left to decrease contrast (inverted S shaped curve).
Contrast Center
Contrast increases the image contrast mainly in the midtones. Using Contrast
Center, you can adjust where the contrast is increased. To enhance contrast in
highlights, the Contrast Center is shifted toward the highlights. To enhance contrast
in shadows, the Contrast Center is shifted toward the shadows.
Set the image contrast, by adjusting the Contrast slider.
Your change affects the gradation graph by moving the point where the curve
changes from convex to concave.
Note: Contrast Center only affects the image if Contrast has also been
adjusted.
Enables you to:
View the Before and After views in portrait
View the Before and After views in landscape
Chapter 6 – Color Workflow