Formatting in campaign description

Is there some documentation somewhere about what formatting can be used? By trial and error I managed to find italics, bold, and italics-bold (surround the text with one underscore, two, and three, respectively), but I've no idea what else is available. Strikethrough? Text size? Tables and lists? Images? Links? What's possible? Edit: Following a paragraph with a line containing hyphens turns the previous paragraph into a header. Edit: It seems like it's straight-up using Markdown. Markkdown Syntax page

Wow. Thanks for the tip.  Did not know that we can use Markdown sytax in the campaign description.  That will prove useful.  I haven't seen this mentioned in the Wiki (Help & Docs). Do images work?

I haven't tried any images, but that should be a simple thing to test, no? ;)