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Undocumented PDF viewer options in nightly Kindle builds
While testing the PDF viewer I stumbled upon the following undocumented options whose function is not obvious from the context:
1. Settings > Writing Direction > LTR, RTL, TBRTL
What does TBRTL do?
(Note that the Document Language option is flush with the left screen border. Ideally, all options should be moved a couple of pixels to the right. Or simply shorten Document Language to Language.)
2. Page Crop > manual, auto, semi-auto
What's the difference between the auto and semi-auto options?
(Note that the auto and semi-auto buttons partially overlap each other.)
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