To select an item that is under another item on a QuarkXPress page, just Command-Option-Shift click on it. (Windows: Ctrl-Alt-Shift) The topmost item will be selected first, then the one under that, and then each one in turn down through the stack.
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.