Adding a Button using HTML
Of course, if you want to, or need to, add icons using the actual HTML, it can be done by using the Include HTML element.

In the example shown above, an Include HTML element has been added and its HTML code is set to:
<button type="button" onclick="window.location.href='http://www.google.com'">
<i class="fa fa-chevron-circle-up fa-2x"></i>
</button>
which uses the onClick event to trigger an action when the button icon is clicked.
And the resulting icon is shown above.