For example: if a voucher/offer is being run for ‘spend £40, get £5 off’, at the end of the order before payment and this ‘offer/voucher’ pop up before payment to prompt both staff and customer to upsell. 

Currently, we can show a promotion like this on the Customer Facing Display (CFD) while an order is placed using an image slide. As this is on the CFD, the staff would not be prompted but it would be visible to the customer during checkout.