I'm using Print Layout view in Word 2003, and the page dimensions have gotten all weird. It's like someone lopped three-quarters of an inch off the top and bottom of the page.
Word hides unoccupied whitespace to help you see the rest of your document more clearly. To restore all the whitespace, choose Tools » Options, click the View tab, and check the "White space between pages (Print view only)" box.
Edit in Print Preview
Why can't I edit in Print Preview, so that I can see the effects of my edits?
You can. Just click the Magnifier button on the Print Preview toolbar, and you're in business.
If you like editing in Print Preview, you'll probably want to make Print Preview automatically open in editing mode. You can do this, but only by using a macro.