How do you separate your categories?

[Jill]

I love the set up on this board where there are 4 or 5 categories and then a bar across the page. Over at my community board they explained to me how to add the bar but not how to set up the categories. So wanted to ask if its possible to change the categories I already have set up on my board in this way? Or would I have to create new ones?

Thanks for any input.
Jill