Okay, I've read more forum threads now. There's still some confusion and contradiction on this topic, but here's what seems to be true:
_ To specify an
individual book's font, you can use
Calibre to convert it to LRF format, which includes font options.
_ To specify a default font for
all books, you must follow
this procedure, which requires you to flash your Reader with the Boroda hacked firmware. You can then set the default font for all EPUB books on your device (and presumably use an app like Calibre to convert your non-EPUB books before loading them).
Is that about right?
(P.S.: Isn't it weird how this forum doesn't underline links? It makes them a tiny bit darker. But it's too subtle for me to see here on my laptop display, so I've added manual underlines. I wonder what they were thinking?)