The following tells you how to undo something (many things) that you just did on a computer:
A "shortcut" is something you can easily do on a computer keyboard that will help you complete a more complicated computer task.
You will have to hit 2 buttons at the same time to accomplish tasks.
CTRL+Z = Undoes what you just did. Be careful not to hit it more than once, because you can keep undoing stuff that until nothing is left!
This action applies to acts of creation, like in documents, presentations, or simply typing in a search engine.