Joyce, to answer your question, HERE is a tutorial on how to do it, and HERE is a script that will do it for you. The main reason why digital scrapbook templates are mostly in 3600×3600 is to imitate the traditional paper scrapbooking, and 12×12 simply gave more space to work than the 8.5×11 papers. But you are not the only one who prefers a smaller rectangular format over the large square one.
