For a live demo of this feature please visit http://demo.mapsmarker.com
Leaflet Maps Marker Pro uses the QR provider Visualead.com as new default for creating QR code images to fullscreen maps:
Since pro v1.5 the generated QR code images are cached to deliver a higher performance on subsequent calls.
If you want to use a custom background for your QR codes, you have to sign up for a custom visualead API key.
In contrast to the free version, the pro version also removes the visualead logo and backlink on the QR code output pages.
Visualead QR code settings:
If you´d like to stick to the old QR code provided by Google, you will be able do so by selecting Google as QR code provider.