This wasn't a web thing. I was publishing a novel and the pritners wanted the cover file on PDF format for printing. When I packaged up the cover design (front, back, and spine all on one huge page) it had to be 600 dpt for the print to be professional quality. It was a TIF file, if I remember right, which is also a large file. The thing was HUGE. I had to ship it to them on a CD because my internet provider wouldn't allow that large a file to be transmitted via e-mail. This is actually a print book, not a web file (you can read about it on my website if you're interested). I don't know why it's so large, either. In fact, it confused me, too. But that's what it turned out to be. WHen I tried to submit a lower res file, the printer rejected it because they couldn't get a sharp copy from it. shrug Maybe it's because I'm using an older version of Acrobat. I don't know for sure. Melanie