Let's first go in and add some more text to the "Content" area of the panel. Just grab any text, maybe a few paragraphs worth. This is just to give us a better idea of how it's going to look. Next, let's dive into the CSS file (SpryCollapsiblePanel.css - in your SpryAssets folder) and slim it down to a reasonable size. Find the ".CollapsiblePanel" class because we're going to add an attribute underneath there.