>Well, both GIF and JPG use data compression, and both are therefore smaller than BMP.

But, the same JPG if saved at 95% vs 75% will result in a bigger size.

>According to my experience, that makes GIF idea for screenshots, and JPG ideal for photographs.

Yes, I always do screenshots in GIF. The advantage of that is that I can manipulate the graphic and save it again without loosing quality. In JPG, you need to have the original base file and save it from that into a JPG in order to keep the same quality. Saving a JPG over a JPG decreases the quality of the image. We have the problem with our magazine. Sometimes, writers send us JPG files. This is a nightware to deal with that. As I always have to edit those pictures, it doesn't provide us flexiblity. In some occasions, I had to play pixel by pixel to readjust some thing in it.