Several people recently have told me they're unsure how to format a manuscript for submission to a magazine, so I thought I'd offer a few suggestions.
1. Always read the guidelines and follow any rules or suggestions regarding formatting (and everything else!) Unless the guidelines state otherwise ...
2. Use a plain, standard font in a reasonable size.
3. Put your name and contact details on the story document, even if you've used a covering letter or cover sheet.
4. Any covering letter should be brief. Editors are busy people and if the story requires masses of explanation then it probably needs to be rewritten.
5. If sending by post, print on one side only and number your pages.
6. If emailing, format as for printing and be sure to save the document in a standard format (e.g. .doc) so it can be opened, or include in the body of the message.
7. Double space. (That's the lines, not the words or letters)
Don't get too stressed over formatting. It's the story which is important, not how it's presented. As long as it doesn't break any submission rules and can easily be read, you'll be fine.