On the Orders screen inside the POS, open the order and tap Notify Customer Order Complete, then confirm Notify in the "Are you sure?" dialog. This sends the customer an "order ready for pickup" email using the same template/trigger as the rest of Sprwt's automated order emails — it doesn't post an SMS. Notifying doesn't change the order's status; it's purely a heads-up email. There's a separate Print all meal tickets button on the same row to send that order's meal labels/tickets to the printer.