Show hierarchy in category listing?

Hello-

What I’m trying to do is make the wp_list_cats function indicate which categories have “parents” by making a list with bullets and sub-bullets.

Example: http://www.thenonist.com (click on the categories button in the left hand sidebar)

In other words, I want my category list to look like this.

• Parent category 1

• Sub-category (under PC 1)

• Parent category 2

I have templates installed in which this hierarchy occurs, but I don’t see any special parameters in the code that would order such a thing to happen.

Suggestions?

Thanks,
Larry