Steven Woody <[EMAIL PROTECTED]> writes:

> okay, i got your point about using the black/white point in the
> picture to set the relative ends of level tool. but how you use
> grey?

The grey color picker helps you to remove color casts from your image.
Pick from a spot that is supposed to have a neutral color. It doesn't
have to be 50% gray, but it should be some level of gray. This will
adjust the gamma values of the individual color channels in a way that
will correct for the color cast.

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