A reader writes to ask:
What does the format look like for a novella? What's the first page look like? And, what do you do with chapters?
The novella is a curious case. Not quite short enough to be called a short story, not quite long enough to be called a novel, the novella exists in a definitional twilight zone. SFWA defines a novella as a work of fiction of between 17,500 and 40,000 words, but to most of the world it's just an awkward in-between sort of thing. It can be a very satisfying fictional lengthjust ask Henry Jamesbut it can be a hard thing to sell. The market for novellas, sadly, is not a big one these days.
In my estimation, the format you use for a novella would depend on where you're submitting it, and for what purpose. If you're sending it to a magazine or anthology, format it the same as you would a short story. If you're sending it to a book publisher for consideration as a standalone volume, you should format it like you would a novel, with a separate title page.