This has probably been asked many times before but... How can I increase the size of a photograph while keeping the quality. I have tried Preview, but the quality decreases after a massive size change. I have also tried AKVIS Magnifier, but it was weird. I have not tried iPhoto or Aperture - If someone can guide me how, that would be great! I have 1000s of photos I would like to change the size of, so if there is a program that can do a batch list of photos, that would be great too! Thanks!