- Hold down Ctrl and press F9 – This will add a Word Field Code
- Enter displaybarcode “http://oldie-it.co.uk” qr \q H between the { }
- With the cursor inside the { }, Hold down Shift and press F9 – This will show the QR Code

Further information on displaybarcode and documentation on the options is available here – https://support.microsoft.com/en-us/office/field-codes-displaybarcode-6d81eade-762d-4b44-ae81-f9d3d9e07be3