Instructions & details of 3.1.1 here, but goodereader isn't reliable.
https://goodereader.com/blog/electro...xes-typography
Edit: seems to be same FW as ottischwenk linked to on an earlier thread, but a different link
https://mega.nz/file/SBAmCDaJ#Q6pGrX...sStLQ136-ymx2k
Edit exact same number of bytes, but I didn't do a file compare.