Mission Control is one of those features that most Mac users never use-and, to be fair, it is a little confusing. You can always change things back if you can't handle it. Don't panic, and try to remember that you hid everything. The first few times you sit back down at your computer, you might be overwhelmed by all of the serious business that fits on your screen at once, and you might also be confused about where your dock and menu bar went. Remember that you did this! It might be disorienting otherwise.
Move your mouse to the top of the screen and it will pop down for you, then disappear when you move the mouse away. Again, the menu bar isn't gone-it's just hidden.
