user70748: I don't have a wireless printer so I'm thinking about writing down the keys by hand on pieces of paper. Obviously I can't copy the QR codes that way. Are they necessary or do they just exist just for our convenience?

user63817: It's just for convenience.
Make sure to d̶o̶u̶b̶l̶e̶ triple check and use a pen that's readable in ten years, too. 

70748: <p>I don't have a wireless printer so I'm thinking about writing down the keys by hand on pieces of paper. Obviously I can't copy the QR codes that way. Are they necessary or do they just exist just for our convenience?</p>
 63817: <p>It's just for convenience.</p>

<p>Make sure to d̶o̶u̶b̶l̶e̶ triple check and use a pen that's readable in ten years, too. </p>
