Understanding Print Preview in Photoshop
http://graphicssoft.about.com/od/photoshop/ss/eb_printpreview.htm

Bruno, Elisabetta
About.com
2005

Abstract:

This is a quick rundown of the Print with Preview function of Photoshop. While it is not a complete guide, it will satisfy the most common needs for the non-designer or the in-house designer. While this article is not meant to explain the Print Preview in all of its details, it will shed light on the most important ones.