This definition uses a collection of printed QR codes to identify physical parts. To easily create large collections of QR codes with known labels you can use the
https://app.fologram.com/markers?qr=0,1,2,3 where
0,1,2,3 defines four codes with labels of 0,1,2 and 3 respectively. If you need to create more codes, you can use Grasshopper to create this string for you and then visit the URL to get a printable PDF.
When you print codes on
https://app.fologram.com/markers?qr=0,1,2,3 you can optionally specify to print multiple codes per page if you do not need the full A4 sheet. This is useful if replacing definitions that previously used small printed Aruco markers.