I have never needed this before but I would like to know how can I get the QR code of an address in Core. Namely, I want to send some BTC to a friend and my friend has a Mycellium wallet. How do I make it so that he can scan my address instead of typing it manually? I just can't find a way to show address in QR format to send, only to receive.
If you don't know the QR code of any address, just go to blockchain.info and search that address. That's it, you find the QR code of that address (to right)