When processing orders, you can save time and improve accuracy by scanning items into the order instead of hitting the + sign button. Once you have a scanner configured at your Fulfillment station, simply open up the 'In Process' ticket you’re working on, and scan the SKU to mark the item as Fulfilled.
To maximize this feature and ensure that the accurate inventory items are being added to orders, you also have the option to make scanning the only way to add an item to an order on the Fulfillment dashboard. To turn this on, navigate to Configurations > Config Page > eCommerce > Saved Sales Fulfillment > Force Barcode Scan.