green, blue) to modify that particular color channel.
❍ If your Image Type is Grayscale, only the Gray channel is
available for selection.
2. Move the black and white sliders to new points on the histogram.
● Moving the black slider to the right will yield more
contrast in the highlight areas of the image, so that more
detail emerges in the highlight areas.
● Moving the white slider to the left will yield more
contrast in the shadow areas of the image, so that more
detail emerges in the shadow areas.
Another alternative is to simply click the Auto button, so that
the the dynamic range for the image is determined
automatically.
3. When the changes are done, click OK. For more details on the effects
of the other action buttons, see the section
The Action Buttons.
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