If you would like to add a red rectangle button with an arrow (like on the homepage), follow these steps. Using the content editor, add a link. The text is what you want the button to say and the link is where you want the button to go.
Switch over to the HTML view. The link that you added will look like this:
<a href="http://www.publichealth.pitt.edu/home/prospective-students">Learn more</a>
The style comes from the CSS class that you will add in the next step. The class name is "upphBtn".
<a href="http://www.publichealth.pitt.edu/home/prospective-students" class="upphBtn">Learn more</a>
That's it. The button is properly styled.