I was trying to look up my iTunes purchase history and even arrived at the correct support page. Unfortunately, I could not find the “Purchase History” link to click on. In a bit of frustration, I turned to the reliable keystroke for looking up all sorts of stuff on the Mac. ⌘+F triggers the find dialog in Safari, Finder, and a bunch of other apps.
But, in iTunes, it triggers the Lion full-screen mode. So, I was left with iTunes in full screen without the horizontal traffic lights–red, yellow and green buttons–to minimize my window. I scanned around the keyboard and was able to escape back to the desktop via the Expose function key.
To revert iTunes back to window mode, I had to move the cursor to the top of the screen to trigger the menu bar. In the upper right-hand corner, there’s a blue icon with arrows pointing inward to switch iTunes back to window mode.