I am trying to use an online printing site (in this case, www.mpix.com). a friend who uses PS uses them. anyway, I wanted to try them and print a 20x30 photo and I keep getting that the max size I can print is 12x18. How can I increase the picture size to accommodate a 20x30? Are there any other online sites that work and play well with Aperture?
UPDATED: I shot in L JPG mode and the dimensions in Aperture show it to be 2376x1584. For the picture to be turned into a 20x30 it needs to be 2000x3000. How can I do that in Aperture. I tired looking in the Apple's Aperture 3 User manual and your 15 Tips. Is there a way to increase the resolution through Aperture, I guess is the main question? thanks.