On my Mac, I have Exposé set up to show application windows when my mouse lands in the bottom right corner of the screen.  This all works fine and dandy for the most part when my hand is on the mouse… but what if you’re in the middle of coding something and want to flip back and forth between two windows?  Well, there is a more convenient way with a keyboard shortcut.

By the way, application windows are the windows that belong to one application.  For example, if you are using Xcode (which you should be if you’re programming for the iPhone), you’ll most likely also have the documentation open in a separate window which is also part of Xcode.

So let’s say you have the documentation window open to a class that you’re looking up as reference for your code in the main Xcode window.  How can you switch between the two windows?  Easy.

⌘ – ~

(hit “command” and “~” keys together)

This works out very nicely with the ⌘-tab key which switches between programs as the tab and tilde are right above/below each other.