Signature?

I have been trying to find out how to put a signature, i tried searching for other ways on other forums, but they dont help? Is there some special way? i tried doing lots of things but none of them work!
(remember this my first forums ever, Really)

SMF uses UBB code, so instead of html use

[IMG]http://url here[/IMG]

YAY, thanks seph, you can delete this if you want!