iLounge

Once in Full-Screen mode, you’ll notice that the typical menu bar at the top has disappeared—but fret not, as moving your pointer to the top of the screen will make it automatically reappear, complete with a blue box in the upper right corner with two diagonal arrows pointing toward each other inside, which lets you exit Full-Screen mode (the same keyboard shortcut listed above also works for this purpose). If you’re like us, you may find Full-Screen mode to be a nearly perfect match for iTunes’ album art-heavy Grid view, which is the same default view used by the iPad’s Music app.

Whether you’ve got iTunes in Full-Screen mode or not, however, the feature will still offer something for one of iTunes’ sub features in the upcoming iTunes 10.5: the Visualizer. Fire up the Visualizer by selecting it from the View menu or hitting command-T, and the Visualizer appears in its own virtual Full-Screen desktop, letting you move quickly between it, iTunes, and whatever other applications you might be running. As if iOS 5 wasn’t enough to look forward to this fall.