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black point, brighten, brightness, contrast, darken,darkness, exposure, high spot, light, lighten, midtones, shade, white point
Highlights are the brightest elements in an image; shadows are the darkest parts.

The black arrow indicates the shadow areas of the images. In a color image, look for the darkest colors. In a grayscale image, look for the darkest gray or black areas.
The white arrow indicates the highlight areas of the images. In a color image, look for the lightest colors. In a grayscale image, look for the lightest gray or white areas.
Adobe Systems Incorporated