<p>An integral part of the HTMLBook spec is the concept of sections. </p>
<sectiondata-type="sect2">
<sectiondata-type="sect1">
<h2>The Magic Line</h2>
<p>Hover over this paragraph of text. See that blue line that appears? That line helps you insert a new block wherever it shows up. By default, the line will insert just a plain paragraph, but once you do that, you can use the Insert... menu to change that new paragraph into a whole new section, sidebar, note, or some other book element.</p>