Tip acceptance is not set as a default functionality. Please contact our Support Team or your account manager if you would like to enable tips on your device, if not done during signing up to our service. Once tips are enabled on your device, navigate to the Sale icon on the home screen, enter amount and select green button. You will then be prompted to manually enter the tip amount and press the green button. The total amount including the tip will appear on the screen and the customer will be prompted to insert/tap/swipe card or use manual entry, if you have card not present transactions enabled.