Chapter 3. Units and Values


3.2.2.1. em and ex units
<html>
<body bgcolor=”yellow”>
<H1>Left margin = 24 pixels</H1>
<H2>Left margin = 18 pixels</H1>
<P>Left margin = 12 pixels</P>
<br><br>
<P>Although this text is the default size for the user agent, the
<SMALL>small-text element</SMALL> within the paragraph has a font
size which is 80% the rest of the text in the paragraph.</P>
</body>
</html>

3.2.2.1