Mac desktop appears to be zoomed in

If you own a mac and your son or daughter decides to play with the keyboard, you may find yourself with such an issue. 

My screen was zoomed in about 30% so I had to move my mouse to the corners to get the page to move to see the entire page.

Here is how you fix that:

Hold down the CTRL button and scroll down with your mouse.

Viola!  Zoom in or out depending on your situation.