epigraph
I was thinking about this too. There seems to be some variation in publications, I have no idea about submissions, but I think:
Indent all of it a bit more than the normal 1st line of a body paragraph.
- No first line indent.
- Be wary of more than one paragraph, keep it short and snappy.
- Last line ends <space><EM dash (long dash)><space><attribution> on same line, or if poetry / verse on a newline, and right justified. There seems to be variation in this.
- The quotes are not quoted overall, quote marks only used in nested quote/dialogue in the epigraph quote/block.
- It can be imaginary author.
- Anything in copyright needs clearance, even though in most countries it's "fair use".
- Music lyrics are very expensive.
I think in a submission I'd use what ever size & font they asked for on the main MSS, and just indent more with no extra 1st line indent for epigraph.
Not in submission:
In my eBook & printed self publishing I use a serif font for body, a slightly smaller sans font for epigraph formatted as above. Some people use italic, I dont.
Any display screen text listed in body is monospace font even though only text consoles use that. I might use italic for notes, emails etc in text body. I use Italic for telepathy with tags but no quotes as if speech. If there is no telepathy in a book, I use italic for thoughts, otherwise no italic or quotes but clear, Sam thought, etc tags in the thought and separate paragraph from someone else's dialogue or actions or narration.
@tinkerdan gives good links above.