The Shadows / Highlights filter allows for stronger manipulation of the shadow and highlight tonal regions in an image. It can be used to reduce contrast, boost shadow detail and recover highlight detail.
About the Shadows / Highlights filter
This filter can be applied as a non-destructive, live filter. It can be accessed via the Layer menu, from the New Live Filter Layer category.
The following settings can be adjusted in the filter dialog:
Default—The improved version of this filter, introduced in version 1.7. Recommended for more natural-looking results.
1.6—The classic version of this filter, retained for backwards compatibility with existing documents.
Shadows Strength—control how much shadow detail is boosted.
Shadows Range—specify the tonal range to boost. Moving the slider to the right will boost a greater range of shadow tones.
Highlights Strength—control how much highlight detail is recovered.
Highlights Range—sets the tonal threshold for recovering highlight detail. Move the slider to the right to recover a greater range of highlights.