1.- Go to the Register

2.- Then load or create your customer

3.- Once a customer is attached to a transaction,  go to the Action Panel>Customer section and click on the button "Add Card on File"

4.- Next, swipe/dip/tap the customer the card at the payment terminal, or if the card is not present, enter the card info manually using the payment terminal numeric keyboard. 

5.- If everything is OK with the card, you will receive a confirmation message - or if there is an issue -  you will receive an error message.