The Quick Receipt mode is designed for serving customers in line at Fast Food establishments to speed up cashiers' work at the cash register.
The waiter takes an order from a customer in line, then sends it off, and gives the customer their order number. The customer mentions the order number at the cash register, the cashier opens their order, and receives payment.
In this mode, the created order is sent to the cash server, from which it is later loaded onto the appropriate cash register.
When sending an order, it is assigned an electronic queue number (manually or automatically). Using this number, the order is loaded onto any cash register for further work with it (editing and paying).
Setting up interfaces for this mode is described in this article.