Tap on Items to display the item list.
Tap on Item to display action menu.
Tap on Manage QR / Barcodes to scan.
Tap on Capture QR / Barcode.
Position camera over the barcode.
Tap on Done when finished or tap on Scan Next to scan the subsequent barcode.
Note: To switch on / off the torch (light) during scanning, press the Volume Up / Volume Down button of your device.