You can use these BBCode tags:
- [b]bold[/b]
- [u]underlined[/u]
- [i]italic[/i]
- [color=red]red text[/color]
- [url=http://example.org]link[/url]
- [img]http://path.to/a/picture[/img]
- [quote=source]quotation[/quote]
- [code]program code[/code]
- [js]javascript code[/js]
- [xul]XUL code[/xul]
- [list] [*]this [*]is [*]a [*]list [/list]