The URL manifest itself in every post as a little square, book icon, to the left of the subject, topic.
(The number of the post is at the other end, next to the date as you now.)

It’s pretty much similar to other forum software. Sometimes one doesn’t want to refer to a thread, but a specific post within a thread. Right click the icon and select copy link, then paste it into the software, mail client etc. Or as Ian described, creating text links in the forum software.

(It´s of course also possible to copy the link to a post from a reply to said post, i.e. using the [Re: XYZ] at the other end of the subject.)

A topic for the "TM: Info, Ideas & Suggestions" subforum?