styling dynamic sidebar

Hi. I’m a real newbie here so forgive me if this is a basic question. I’ve installed a widget from Automattic for a dynamic sidebar. I know something of css so am happy setting styles. But I can’t work out how to see how the dynamic menu parts are being tagged. If I view the source of my document it just tells me is a ul and the div class for each of the sections is title. How can I get into the dynamic bits, or am I using the wrong widget? for nasty sidebar at present! As I’m so new, I’m just playing with editing a default theme.
Many thanks,
Rosemarie