"Don Sanderson" <[EMAIL PROTECTED]> wrote: >The "history brush" is not a term I'm familiar with, neither is "USM". >Could someone explain a bit.
Pick up a copy of "Photoshop for Photographers" by Martin Evening. It is what it says it is and it's superb. USM is short for "unsharp masking", which is an old black & white darkroom technique for enhancing accutance. Photoshop can simulate it digitally with an amazing amount of finesse and control. The history brush is more difficult to explain. It's a way of transforming select bits of an image to a state they had earlier (or later, if you're viewing an earlier stage). As I said, it's difficult to explain! Get the book :) -- Mark Roberts Photography and writing www.robertstech.com
