Top Level Categories display graphically

Is there an easy way to make the top level categories display like sub-categories with clickable images on the home page? I haven't seen anywhere to set this in the admin and don't know how to do it with PHP if that is necessary. I want to do away with the text based sidebar for categories and make it more visual just like the sub-categories are. Any help is appreciated.

Zen level: beginner
PHP level: Intermediate

You can turn on the Always show on main page and set the Category to 0 in the Layout Settings ...

Categories - Always Show on Main Page
Always Show Categories on Main Page
0= off
1= on
Default category can be set to Top Level or a Specific Top Level

Main Page - Opens with Category
0= Top Level Categories
Or enter the Category ID#
Note: Sub Categories can also be used Example: 3_10

Hmm... guess I overlooked that setting. Thanks for the help :)