Simple Font Changes

The simplest tags are:

<i>Italics</i>
<em>Emphasis</em>
Italics
Emphasis
The <em> tag usually renders as italics, although this my vary depending on the browser
<b>Bold</b>
<strong>Strong</strong>
Bold Strong  
<u>Underline</u> Underline This should be avoided, as most users think of underlined text as being a hyperlink.