Mura's Default Document Structure as an Outline

Viewing the markup structure as an outline, it would follow the following structure:

<div class="brand">Site Name</div>
<h1 class="pageTitle">$.content('title')</h1>
<h2>1st Subhead (Headline in WYSIWYG)</h2>
<h3>2nd Subhead (1st Subhead in WYSIWYG)</h3>
<h4>3rd Subhead (2nd Subhead in WYSIWYG)</h4>
<h5>4th Subhead (3rd Subhead in WYSIWYG)</h5>
<h6>5th Subhead (4th Subhead in WYSIWYG)</h6>

Note: It is by design that the headings in the WYSIWYG editor do not match the output. This was done to help maintain a logical document structure by allowing non-technical content-contributors to focus just on the content they are working with within the editor, rather than entire html document.