End User Experience: How to split payment across multiple credit cards/gift cards

Customers can  split payment between any number of credit/debit cards, gift cards, and digital wallet payment methods (Apple/Google pay). Customers can enter specified amounts for each payment method. If a customer has gift cards and no credit cards, the gift cards are automatically selected.

Press "Or use another card" 

Toggle "Split between cards" to select multiple payment methods.

Each selected payment method will display with an adjustable amount field. Fees are determined by the amount entered.