Upsell items will show under the Goes Well With section when a customer is adding an item to their cart.
Steps:
From the Owner Dashboard, click on Restaurant
Click on Menu
Click on Items and click on one.
You will see an Upsell Item switch under the Promotion section
Items with this enabled, and with 0 modifier options will appear under the Goes well with section on the item when clicking on it.
(These are meant to be 1-click additions such as french fries or a drink)
