While Final Draft offers numerous industry-standard script templates, macros, shortcuts and transitions, unfortunately we're not really able to answer anything but the most basic style and format questions. The technical support we offer is for the operation of the software itself.
We're not arbiters of screenwriting style, although we're confident that scripts submitted using Final Draft's defaults will be seen as being properly formatted. Further, when you do determine the "right" or "best" way to apply special formatting to a section of your script, Final Draft is customizable and flexible enough to allow you to do just about anything you need to do.
For questions such as "How do I format a split-screen montage with music and sound effects?" or "What's the best way to write subtitled voice-over dialogue intercut with a series of shots?" we recommend consulting a book on screenwriting conventions and customs. One of the best we've seen is The Screenwriter's Bible by David Trottier. Search The Writers Store, The Drama Bookshop or Amazon for other titles on script formatting.