I wasn't really trying to be pedantic. If you really want tools that natively and in the user interface constantly refer back to pixels in the original scan, then you really have to stick to formats that are innately raster based. TIFF, PNG, etc. I maintain my scanned images as PNG's. I used to have a real hatred for PDF's as a way of showing raster bitmaps but have learned to respect my enemy in this case :-). (Incidentally I am still a big fan of SVG despite Adobe's abandonment of it.) I think at least some of the TIFF formats can contain tags for how large each pixel was in the original source. Don't know how standard vs proprietary these tags are. Good multi-page PDF viewers are freely available. The free, distributed with the OS, TIFF viewers by contrast are perhaps even suckier than they were a decade ago. Tim.