I wonder if someone can provide feedback on this question... I'm working in greyscale in Photoshop and whenever I use the 'Curves' or 'Brightness/Contrast' functionality I find, after making and previewing changes, that the chenges are not fully made to my image. The contrast/brightness changes are less than shown in the preview window. After making the changes, I can see a kind of additional 'grey level' placed over my image by Photoshop and the amount of contrast/brightness I requested is not occuring. Is there some preference of some control I have missed that is stopping the contrast/brightness changes being made as I would like? The images are 8-bit, greyscale. Thanks for any asisstance!