Aperture Screencast 1: Designing a Postcard with Custom Layouts
Subject:   printing
Date:   2008-09-17 21:50:52
From:   Thaddeus Harden
A note to everyone. As you watch this video, you'll notice a lot of pages to the left that aren't used. And also you'll see in the lower right.(greyed out) "21 pages, custom sizes (6x4). These pages will still print unless you delete them!

I'm interested in how one goes about printing on the back side of this post card and how that is submitted to a professional printer. Are there any tutorials, tips, or suggestions regarding this?