Log into your INFI console by following this link: https://infi-console.firebaseapp.com/auth/login
Click on the MENU icon on the left hand side of your screen seen in below image:
From here click Cross Sell to see all of your cross sell rules. To add a new one click the button "Create a Cross Sell Rule"
From here choose the location you would like to add this rule to:
Next choose the item you want suggestions to come up for when a customer clicks on it. For example in the image below if a customer chooses "Maracuya" then a screen will pop up showing items to suggest
From here you will choose the items to suggest once the primary item of "Maracuya" is chosen
That's it, you're finished! From now on once a customer chooses this item these three other menu items will be suggested.
See below for example of what the customer will see: