Well... That's an unusual example of luck in fiddling around with the help of some tools.
Create file
/mnt/us/documents/reflow (content doesn't matter), then restart framework:
Code:
# touch /mnt/us/documents/reflow
# restart framework
Open PDF, invoke menu and there will be a new toggle option
Text-Only Display. I've tested it on
this file, it works.
BTW, option should be displayed under the name
Original Display when reflow mode is on, but it doesn't for me. Anyway, it switches between modes just fine on Kindle Touch 5.3.2.1.