VIDEO TUTORIAL: http://www.shoppepro.com/tutorials/storeadmin/Add_Category.html
To add your store categories, follow these basic steps.
- Click "Categories" (under E-Store).
- Click "Add".
- Enter the name of your category.
- (If you are creating a subcategory, select the main category you would like it to appear under from the drop down box).
- Enter your category Description.
- Layout: Choose a layout for the products in this category
- Click "Add Category".
For more detailed information about how to add store categories, click the 
at the top right-hand corner of your Store Admin area, while you are on the "Categories" page.
