What is the best way to learn how to do something? I think it's seeing how someone else did it.
I (in minnemooseus mode) have recently started sometimes using UBB or HTML code, to supply links using a word or phrase instead of showing the entire URL. After doing my first effort at such, wj inquired how I did it, and I attempted to explain as best I could.
I have just come to realize that anyone can look at any message, in the edit mode. You can even edit away - but you can't successfuly submit the edit unless it's your own message, or you have "Admin" status.
So, if you see a message using a feature you don't understand, just click the "edit" button at the bottom of the message, and you can see it, complete with the UBB and/or HTML code.
Adminnemooseus