[ENHANCEMENT] A function to display only QR code

[yringot]

Is your feature request related to a problem? Please describe.
Scanners at the airport get confused when presented with eg. a boarding pass with a QR code and the same extracted QR code when using Greenpass. Currently the solution is to deactivate the QR code extraction and zoom the document to show the code.

Describe the solution you'd like
The ability to tap the extracted QR code to have it be displayed alone without anything else and maximized. Or maybe via a "maximize" button?

Describe alternatives you've considered
See above for workaround. Another would be (but I didn't test this) to zoom in the document and to thus hide the embedded QR code.