The functions of Photoshop and Photoshop Elements are so amazing, it's
almost like magic!
Here's a magical way to quickly re-size your document. When you want to view
your document in the editing window as large as possible, press Ctrl + 0
(Mac: Cmd + 0) on the keyboard. This fills the editing window with your
open document. I find this a fast way to return to workable size when I've
zoomed way in or way out to work on the project.
When you want to view your document at actual size, press Ctrl + Alt + 0
(Mac: Cmd + Opt + 0) on the keyboard. This is especially helpful when you
are resizing your project for viewing on the web or in online galleries.