When using the new Start screen and metro-style apps you might notice there isn’t a close or exit button like you’re used to with traditional applications. Part of the reasoning behind this is that when not used they’re supposed to consume very little system resources and even automatically close after a while.But if you have too many opened at once it may be confusing when switching between them.
If you’re a shortcut fan, you simply can hit Alt + F4 to close an app. If not, Microsoft did include a way to close them: simply click on the top of the screen (or tap with your finder), hold, and drag it down to the bottom of the screen and then let go to close it. It’s sort of like grabbing the screen and throwing it away in an invisible trash can on the bottom.