When several items or objects in a page layout overlap, invariably the one that you want to edit is sitting behind another. Luckily, QuarkXPress provides a simple method for selecting objects behind other objects.
In QuarkXPress, just Command-Opt-Shift click on the item that’s in front of the others (Win: Ctrl-Alt-Shift). With each subsequent click, QuarkXPress selects the next item further back in the stack until it reaches the back — the next click selects the front item again. When an obscured item is selected, you can bring it to the front using the F5 key.