First I want to start by saying how incredible the whole project is, so thank you Oliver for doing it.
I read somewhere on the forum that the plugin for Cloud Printing works with specific Thermal Printer. I can add that it actually works for my two old Thermal Printers with just a basic setup.
My question is regarding the control of size of the font on the printout. The receipt looks good except the overall font could be adjusted to be a bit bigger. Where/how could I alter that, please?

Thanks