Operation Manual

4 Do one of the following:
• Drag the Black Levels and White Levels sliders to where they touch the outside of the
histogram graph, constraining the image to its new black and white points.
Drag the Black Levels and
White Levels sliders to where
they touch the outside of the
histogram graph.
• Select the numbers in the Black (B) and White (W) fields, then enter a value from 0.00
to 1.00. By default, the black point is set to 0.00, and the white point is set to 1.00.
The tonal values for shadows and highlights in the image are updated, resulting in more
defined blacks and highlight values as well as increased overall contrast.
You can also use the Gray Levels slider if you need to adjust the brightness values of the
midtones while limiting the brightening effect in the black and white points. The brighter
areas of shadows and the darker areas of highlights are affected, but the effect tapers off
as it nears the dark blacks and bright whites.
Before Gray Levels adjustment After Gray Levels adjustment
560 Chapter 17 Making Image Adjustments