I convert Nikon .NEF files to 16-bit TIFFs using Nikon software View NX2. I would occasionally like to make minor edits in ThumbsPlus, but I get this error message: "[file name] is a multi-page file containing 2 images; saving with the same name will save only the current image -- other images will be lost." ThumbsPlus then asks if I want to save with another file name, which I never do. When I check file/properties, the saved file is still 16-bit, which is great. But, I would like to know what the error message is trying to tell me about the multi-page file. What am I losing by saving as a single image? Thanks.