In ERPLY, products are organized in groups for a cleaner, easier way to sort through inventory. When importing and creating products (review here and here), all products are required a product group. Once that group is created and assigned, it appears in the Point of Sale QuickServ view as the top row of buttons. Product Group buttons are a darker shade of blue than product buttons.
If there are more than six Product Groups, the sixth button will change to a "more" button.