Enterprise POS accepts payment two ways round, and both are valid.

Method 1, payment type first

1. Select the payment type.
2. Enter or confirm the amount.

Method 2, currency amount first

1. Specify the currency amount.
2. Select the payment type.

Method 2 is faster for cash where the guest hands over a round figure.

Payment types

• Cash, including one touch tender for common amounts.
• Card.
• Gift certificates.
• House account.
• Personal checks.

Other tender screen actions

• Remove pay type if the wrong tender was selected.
• Tax exempt orders, handled from the tender screen.
• Return to order entry without losing the order.
• Re-tender an order.
• Reprint receipt.
• No sale, to open the drawer without a transaction.

Split payment

Split payment uses the same two methods: select the payment type first, or specify the currency amount first. Use order segments instead when the split needs to follow who ate what rather than just how the total divides.

Reference

Tender Order, Split Payment, Tender Screen Overview.

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.