How to print QR codes for added books?

In the "Print QR codes" tab, you can see a list of QR codes for books that you have added but have not yet printed QR codes for them.

The print format is set to sheet labels H01 (38x212mm).

Click "Choose a page" at the bottom right.
It makes sense to fill the entire page with codes and print it at once to save stickers.

Click on "Print".

After printing, the system will ask you if it can consider the given codes as printed. If the printing went well, select "Yes". The printed codes will disappear from the printable list.

Done. You can stick on the QR codes to the books.