The page header comprise of a surround and an optional component - the page menu block.
<header class="content-header">
<h1 class="title"><!-- The page title goes here --></h1>
<!-- The page menu goes here -->
</header>
The page header can be used multiple times on a single page however the number in the <hx> tag should be incremented to a maximim of 7 to indicate sub headings, sub-sub headings etc.