Enter the household passcode. You only need to do this once on each phone.
Teaches the app the name; nothing is added to your lists. Renaming it also renames every item with this barcode.
The code itself doesn't change, so labels you've already printed keep working. Reprint only if you want the new name on the label.
Printed labels for this QR code will stop working.
Line the barcode up with the red line.