Currently when using the customer order functionality user are not able to add products to the transaction at the time of customer pickup. These order are also locked in the order fulfillment screen from editing once the picking process has been completed.

This makes it difficult to up-sell customers with items that are available within the store as it would be a time consuming process put the order back into edit mode before processing pick up

In the same fashion that functionality was added for customers to be able to carry-out items when the transaction is being created, users should be able to add additional products at the time of pick up for items that can be carried out of the store.

Any new items added to the transaction at this time will have the delivery method of customer carry-out selected and could then be processed under the same payment transaction if needed.