If you’re a bit befuddled the first time you fire up Microsoft’s newest operating system, we understand. Microsoft’s left a number of navigational elements invisible to your eye unless you move your mouse over one of the four extreme corners of your screen. Hover your mouse over the top-right or bottom-right to access the Charms Bar: Windows 8’s built-in Search and Sharing capabilities, as well as a list of devices you can send the contents of the current app to and Windows 8’s ever-important Settings menu. Hover your mouse over the top-left or bottom-left corners of your screen to jump between open apps on Windows 8’s “Switch List,” just like you would otherwise do by hitting the combination of alt and tab on your keyboard.