What type of images should I use?
Page count depends on the type of binding you selected.
If you are starting a design before creating an account please note that the pictures that you upload and use in your design will be saved to your design. Any pictures that are uploaded that are not used in the design are not saved because there is no account to save them to.
Be sure to register an account when working on a design and save your design to your account (if you’re in the design tool and want to save or login: Click SAVE > Name Your Design > Login or Create an Account and after you will be redirected back to your design).