I was certain we had a tool to redefine the size and placement of the screen touch zones.
We do, it is one of the patches that can be applied with JBpatch:
See:
https://www.mobileread.com/forums/sho...d.php?t=175512
and the Wiki page linked from that post.
The details of what can be changed can be seen in the patch comments:
https://bitbucket.org/ixtab/jbpatche...e-view-default
Note: Each firmware version requires a re-write (due to Amazon's obfuscated code).
The most recent firmware version supported is 5.3.4
I would suggest targeting 5.8.5 since it is running on all 6th, 7th, and 8th generation devices.
Note: Note: JBpatch is not Kindle specific, it can be used to patch ANY java binary at load time.