When creating or editing a message, you should be seeing a clickable
(help) to the right of both "HTML On" and "dBCodes On". Click on those to get information on how to do things (or the link in the previous sentence to get to the dBCodes help). The help page should open as a new tab, at least is does for me in Firefox.
You can also use the "peek" at the bottom of anyone's message, to see the raw text that includes any coding used in that message.
Adminnemooseus
Or something like that©.