In any version of QuarkXPress, you can toggle between a document page and its Master page by pressing Shift-F10.
In QuarkXPress 8, it’s even easier: just click the View Master Page icon at the bottom left of the Layout window.
Jay Nelson is the editorial director of PlanetQuark.com, and the editor and publisher of Design Tools Monthly. He’s also the author of the QuarkXPress 8 and QuarkXPress 7 training titles at Lynda.com, as well as the training videos Quark includes in the box with QuarkXPress 7 . In addition, Jay writes regularly for Macworld and Photoshop User magazines and speaks at industry events.