You take payment for an order by pressing "PAY" when you have added items to your current order on the EPOS view, or whilst viewing a tab on the Summary view.
First select the payment type. The amount to be paid will default to the amount due for the order (or tab), but if you are taking payment for a different amount you can enter it using the keypad or the blue quick amount buttons on the right.
Hint: If you need to split a bill evenly between customers you can use the orange quick split + and - buttons to quickly calculate the amount to charge each customer.
Press "ADD PAYMENT" and unless you have any further payments press "DONE".
If the payment was cash you will be shown how much change to give to the customer.