The default histogram display seems wrong in Gimp, by the standards of photoshop and a number of other image management programs. There is a link below to an image demonstrating what I mean. (I am cross-posting this to Filmgimp, because there seems to be common histogram code). An optional plug-in for Gimp called "Color Correction" seems to do histograms the way I would expect, i.e., giving meaningful feedback to determine (about a photograph) whether the exposure was well chosen, and serving as a useful guide for correction using levels and curves. Take a look at this image to see how Gimp's main histogram display compares with the Color Correction plug-in's. http://www.marso.com/images/example.jpg I can't find the Color Correction plug-in at the Gimp registry, so I've put a copy of it at: http://www.marso.com/color_correct.tar.gz Best Regards