Bring to Front, Send to Back in QuarkXPress

When items are stacked on top of each other, you can bring the selected item to the front or send it to the back by pressing a keystroke:

 F5: Bring to Front

Shift-F5: Send to Back

Add the Option or Alt key to bring forward one level or send backward one level:

 Option/Alt-F5: Bring Forward

Option/Alt-Shift-F5: Send Backward

OR, just right-click or Control-click on an item to bring up the contextual menu and choose one of the options under Send & Bring: