Starting from version 2.6.3, you can add an “OK” button on the payment page if you want.
The payment page for checkout mode II looks like the picture below.
When there is no “OK” button, tap the cash choices or other payment methods, and then it will directly come to the change page.
Quick tap this area about 5 times.
“OK” button is displayed.
When the “OK” button is activated, choosing a cash or payment method, it will turn red.
Tap “OK” then you will see the change page.