I'm not totally sure what you exactly mean, but most of the more specialized stuff is under the button that looks like a little grid - 2 over from the green F. There's some stuff in there that might be what you mean (Book index, post link, redirect, autolink, etc.) Not sure which one might be what you're looking for though, and I don't know how to use any of them. But if that feature is on the forum it's probably in there. It's probably post link from you've said but again idk.)
[post=1403069]test[/post]
EDIT: It's Post Link. I tested it out above, and it's what you're looking for. Takes you to a specific post, but it could be any post on the site not just that page so it takes a bit longer to load than if it just took you down the page. Left click the post number of the post you want to link (Number in the top right of a post.) to get the link, then from the link get the actual post number. (Probably a long set of numbers.) And put that in between the brackets the Post Link option gives you.
