NEWBIE ALERT

I am following the tutorial in QT Assistant called "Creating Main Windows in Qt Design", and at the point where you add an action, there is an illustration showing a nifty "Open" icon being added to the menu and toolbar. When I do it, there is no icon, just the text "Open" and no icons are displayed in the Action Editor.

Am I missing something really simple here? How do I add icons?

Thanks,
LITW