I’ve seen it over and over again. I get a manuscript to edit, and it’s nearly impossible to work with before doing some major changes just to make it readable on the page. This is especially true when I’m doing interior book layout. It’s sometimes hard to catch all the odd things writers do (manual line breaks, manual hyphenation of words, spacing in to make paragraph indents, etc.). You’ll save your editors and readers lots of time and trouble if you learn how to set it up right in the first place.
And if you’re asked for 10 pages of a manuscript by an agent, that means 10 pages double spaced, Times New Roman 12pt!
So I’ve created a little cheat sheet here that you can download that tells you all the standard formatting expected by people who may review your manuscript. Feel free to download it for your own use!