PDFs on an e-ink device should only have an issue if you need to zoom or scroll. If it is perfectly readable at full-page, then the only interface is page turn (like printed pages). I think if your eyesight is good, then a 6" at fullscreen may be okay for 8.5x11 PDFs, but you may need to take breaks. One thing pdf readers can improve upon is better margin detection and automatic cropping of them, which I don't know if any does well (my only experience is with a K3).
Last edited by badbob001; 10-31-2014 at 11:14 AM.
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