To have printable page with A4 format, include book‐A4.min.css in header of HTML page.
<link rel="stylesheet" href="css/book‐A4.min.css" />
<link rel="stylesheet" href="css/music.min.css" />
<h1>Header1</h1>
<h2>Header2</h2>
<h3>Header3</h3>
<h4>Header4</h4>
<p>paragraph</p>
Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Vestibulum tortor quam, feugiat vitae, ultricies eget, tempor sit amet, ante.
<ul>non ordered list</ul>
<ol>ordered list</ol>
<div class="neutral">With gray, it's neutral.</div>
<div class="definition">Use blue for definition.</div>
<div class="warning">Use yellow for warning.</div>
<div class="rule use">Use green for rule to use.</div>
<div class="rule avoid">Use orange for rule to avoid.</div>
<div class="rule not">Use red for
FORBIDDEN rule.</div>
<span class="T3">diminished third</span>,
<span class="T3">minor third</span>,
<span class="T3M">major third</span>,
<span class="T3">augmented third</span>.