Let the guest build an order by choosing items from a configured menu (widget or kiosk).
When to use: Self-service add-ons, marken/voucher shops, or merchandise — SKUs live on a Menu, not only as fixed procedure positions.
Configuration highlights: Menu reference, allow-empty selection, localized header / sum texts. Often followed by Input form (RequireInput) then Online direct payment (PayNow).
Outputs: Order positions in the same shape Online direct payment (PayNow) expects.
Alternatives: Add Position (AddPositionToOrder) for staff-configured quantities; Reorder menu (ReOrderMenu) / Submit as reorder (SubmitAsReorder) after an initial payment.
See patterns booking-menu-checkout and booking-with-payment.