Elfwreck,
I have asked the same question in the thread linked to below; Kris777 provided a link to a Sony PDF booklet which was useful for general info, and jgray added a link to the exact jetBook specs (from the Ectaco jetBook forum). You can look through this thread at posts #15 and #16:
https://www.mobileread.com/forums/sho...ht=jetbook+pdf
This info provided answers to all my immediate formatting questions.