Which might lead to a HTML guide.

Using the 'buttons':

bold
italic
underline

quote

Using HTML:

<b>bold</b>
<i>italic</i>
<u>underline</u>
<blockquote>quote</blockquote>
<font color=red>font color=red</font color>
<font size=4>font size=4</font size>
<font size=2>font size=2</font size>