Staff can go an entire day without remembering to tap the Patron tile on the POS home screen. The round-up button is easy to miss when it's not part of the checkout flow itself.

Add a way to surface the donation prompt closer to the point of payment -- either as a popup/reminder during checkout, or as a button near the cart total in the POS checkout view -- so staff are naturally prompted before completing the sale.

Requested by: Denver Art Museum (US, POS Pro + Shopify Plus)