5. i love its dictionary support; i added about 4-5 which i really needed; don't think any other reader has this...
6. just ignore the warning; it can open almost any size...
7. keep the round button pressed for more than 2 sec on a pdf file -> popup menu pops up -> choose pdfviewer -> then in the ZOOM pick "fit width"; u can navigate the upper and lower rest with up/down buttons;
there is even a configuration filein the forum to set "pdfviewer" as your default pdf viewer
https://www.mobileread.com/forums/showthread.php?t=67149