Please add the option to view pages at 80% screen size on the iPad. This will help avoid pixelization issues with lower-resolution scans when stretched to fit the screen. Thank you.
Thanks for the feedback. We will consider it.
We plan to add support for filters soon. Including sharpening/upscaling. That will probably solve the problem without the need of tweaking the zoom, which has many implications.
Echo what @dani said, but also would like to add that our vertical reading mode already supports a 0.8x zoom.