Question: How can I multi-page?

I'm writing a fic right now and I see people using multi-page for various chapters. How do I multi-page threads?

Threads simply gain more pages as they get more posts. It's about 25 posts per page.

Or do you mean something else?

Thanks.
Then does that mean I can't do one post per page? Is this multipaging automatic?

It's automatic yeah, so you can't really do one post of your fic per page. In your settings you can lower the number of posts that appear per page, but that only affects things on your end and you can only go down to 10.

Got it. Thanks.