How to discard a file that's been checked out.
Imagine you check out a file and work on it for a little while. But then you start to think that your changes aren't as good as you originally thought. So now you want the file to go back to the way it was before you checked it out. That's easily done without having to undo all of your changes in the document.
How? You discard the checkout. Just place your pointer over the file, click the down arrow that appears, and then click Discard Check Out. The file will change back to the way it was before you checked it out.