I was told that digital pictures in jpg format will degrade. Do they degrade by simply opening and closing the file or do they degrade only when you fuss with them? What about a jpg that is within a WORD file? I know I have to change to a bit file for my screen saver but my microsoft WORD says that jpg format is better quality for printing on "modern" printers. Also, if I then PDF the photo would a bit format be a lot larger file than a jpg that has been PDF'd. Also what does a PDF do to your photo?

Anyway, I have jpg photos in WORD in my guidebook and I have done a million edits. Does this affect the photos? I am not sure if it is my poor screen, but they do not look sharp anymore. I also have a pretty poor printer so I really cannot tell. Should I take them all out and go back to the originals and change to bit format?