Metric paper size with AirPrint + Cups

metric_cups_airprint.md

- Why do I only get US Legal and US Letter when printing from iPhone?

-- Something has changed in Airprint or iOS and you need to manually set your preferred size in cupsd.conf

Add the following to the bottom of cupsd.conf

DefaultPaperSize A4
# DefaultLanguage <locale> (de,en,fr etc)

delete the contents of /var/cache/cups/* and restart cupsd-service or restart docker container

type ippfind to get the ipp uri of the printer

verify your settings with ipptool -tv ipp://<url> /usr/share/cups/ipptool/get-printer-attributes.test | grep media-ready