Place the button displaying Copy to Clipboard next to the other button on the webpage.

<html>
<body>
<h4>Joke of the Month</h4>
<p>I made a pencil with two erasers. It was pointless.</p>
<button>Vote</button>
<button>Copy to Clipboard</button>
</body>
</html>]]>

Make sure to pick <button>, followed by Copy to Clipboard, and finally </button>.