See the double-arrow button on the left side of the status bar? Click it now. You'll see a list pop up above the status bar that shows every file you have selected. This list is called the Selection Bar.
The Selection Bar is a very powerful tool, and right now, we're just scratching the surface of it. But it's good to know that it's there; it can often tell you answers that would otherwise be very hard to find on your own.