Combination buttons are used for several items that are sold as a group. They work like ten super buttons in one and add these features:
Adds upsizing – Upsizing is available for individual items or several items in a combination
Adds the ability to count options like pizza toppings spread across several pies
Adds the ability to pay one price and get free items as in a two-for-one pizza deal
Since a combination button builds on the knowledge of setting up a super button you should work through all the super button videos before tackling a combination button!