What about your manuscript? If you haven't paid a professional editor to have a go at it, there are lots of places online to help you with your formatting. Here's a link to one that has an easy-to-read list of things to do and things to not do.
And it's a big but.
If you're asked to send in a full manuscript, be sure to check that agent's or that publisher's guidelines for formatting. They aren't universal, and it will stand you in good stead if you take the time to follow their directions--especially if they've taken the time to post them online for you.
Do you have any good places to check out for formatting help?
Donna K. Weaver