The classic example: How do you turn off a Windows 8 machine?
The answer: swipe out the Charm menu from the right side of the screen, choose Settings, touch the power button, and choose Shut Down. Simple, yes?
TEST YOURSELF: The Windows 8 Quiz
Windows 8's Metro interface is anchored by the Start screen, a collection of colored rectangles called tiles that are labeled with text to explain what they are. So the mail application says Mail and has a stylized envelope displayed on it. The tile to access the Windows store says Store on it and features a stylized shopping bag.
The Start screen stretches out horizontally and may take up several screens that can be scrolled by sliding a finger on a touch screen or left-clicking the arrow buttons in the bottom corners.
Metro is distinguished by its use of the full screen to display current applications. All the chrome of the navigation bars and systems tray so familiar in earlier versions of Windows are gone. Tools that serve these functions are hidden off-screen.
Some of these comprise the charms bar, a set of buttons hidden to the right of the screen. They can be called out with the swipe of a finger on a touch screen. These charms are labeled Search, Share, Start, Devices and Settings.
Swipe the left side, and you get the applications bar, which displays a thumbnail of each running application. Pressing any one of them brings it to fill the main screen.