The tips are extra amounts that the customers can add to the total of their bill when they are at the checkout step of the order submission process from the menu.
Tip Enable Settings:
Go to Orders> Ordering Settings.
Select the order type you wish to enable the feature for (Dine in QR, Delivery & Pick-Up, or Tablet Menu)
Scroll down the page to see the Tip's configuration.
Enable the Accept tip option.
Click Save.

