What it is: Mission Control is a way to display all open windows on the screen at once so you can quickly see and choose the window you want to use.
If you regularly open multiple windows, you may wonder which windows are open and how to find a specific window. The hard way to do this is to wade through each open window individually until you find what you want. The easy way to search through your windows is to use Mission Control.
On a keyboard, hold down the Control key and tap the up arrow key. This should open Mission Control so you can see all your open windows and click on the one you want to use. If you have a trackpad, you can also open Mission Control by swiping three fingers up on the trackpad surface.
If you’d like to customize Mission Control even more, click the Apple icon on the menu bar, click System Preferences to open the System Preferences window, and then click the Mission Control icon. This will open a Mission Control window so you can modify the way it works on your Macintosh.
By opening and closing multiple windows through Mission Control, you can always get a birds-eye view of your open windows. Now you should never get lost trying to find an open window ever again.