This can be done via the Business Dashboard using the Menu Editor within Online Ordering.
1.Select Menu Editor under Online Ordering on the dashboard navigation list.
3.We'll create Combos by means of using Add-ons itself.
On the Item Details window, scroll down to Add-on group for this item section.
4.Create add-on items within predefined groups, like ‘Extras’, ‘Toppings’, or general ‘Add-ons’ or choose to "Make your own".
You can also Copy from other items.
Enter the Add-on group name.
Select the Minimum and Maximum add-on items that can be chosen by the customer.
Enter the Add-on Item Option name.
Select the Item Attribute from the dropdown.
Enter the Additional Price for the item it is added to.
5.Once you're done with edits click Save Add-on Group.