How does one add fonts to Koha for the label creator?

 

I’m curious about adding “Arial” ( or rather LiberationSans-Regular.ttf as matched by fc-match) and “Arial Bold” (or rather Roboto-Regular.ttf as matched by fc-match) to the Koha label creator.

 

I see we have a hard-coded list of font types in C4/Creators/Lib.pm. There is also a list of TTF files in etc/koha-conf.xml.