How do I add a QR code to a consumable?

To add a QR code to a consumable, click on the corresponding consumable in the overview. In the detail view, navigate to the "QR Code" section and choose:

• "Scan New QR Code" — the scanner opens and you scan the code directly, or
• "Enter New QR Code" — a dialog with a text field opens for manual entry.

The QR code is validated automatically: if it is not already in use, it is linked to the consumable.

Note: This works the same way for inventory items — see How do I add a QR code to an inventory item?