If you find a site with a huge long URL that scrolls forever, you can use a short form to make it look much neater.
From the posting screen use the URL function - press the insert hyperlink icon (the one which looks like a globe in the 2nd icon row above the box you type your post into) to give you an URL tag, then put an = sign between URL and ] and follow the = with the long link, then between the ] of that long link and the ending [/url] tag type the short text link you want to use... so it will look something like this in your create new message screen:
[url=http://www.example.com]LINK[/url]
which would give this effect:
LINK in the posted message on the forum.
Much neater!