Two order sources that arrive differently from a walk up order.

Loyalty transactions

1. Scan the loyalty card, or
2. Search for the loyalty account if the guest has no card to hand.
3. Redeem the loyalty discount against the order.

Attach loyalty before tender. Retrofitting it after payment is a manager job at best and often not possible at all.

Online orders

Online orders appear in their own view at the terminal. Staff view online orders from the order entry area and work them alongside walk up trade.

Reference

Loyalty Transactions and Online Orders.

Source: Global Payments / Xenial Enterprise POS product documentation. Enterprise sites are heavily configured, so confirm the exact behaviour against the customer own build before advising a change.