Arrows keys are only working correctly, when it was inputed from real arrows, but not from numpad in arrows mode. Also PgUp/PgDown from Numpud are not working.
Created attachment 13268 [details] patch Implement keypad arrow controls for X11 and GL versions.
commit 2932bb43b72fe3b2e309d99321f69cf1398b79eb Author: Tor Andersson <tor.andersson@artifex.com> Date: Fri Nov 9 17:34:46 2018 +0100 Fix 696302: Support numeric keypad arrow keys in mupdf-x11.