I have a Kindle Paperwhite 3 on firmware 5.8.9.2 and can't for the life of me get the left/right margin tweak to work.
I'm jailbroken, have USB networking working, etc. I copied these directions exactly:
https://www.mobileread.com/forums/sh...postcount=1795
But nothing changes, even when I switch the margin setting back and forth. It's not working on either mobi or azw2 files.
Any ideas? Did anyone figure this out?