In the thread '
Onyx Boox Max2 Issues", I've tested a beta version (Beta-7.8.38-c523). This version introduce a percentage to crop the pages usable in '2 pages' mode, you can see this tests here :
https://www.mobileread.com/forums/sh...&postcount=403
A big improvement of the stable version - Librera-7.8.34-c517-arm.apk.
The last beta version (
https://www.mobileread.com/forums/sh...&postcount=402) could modify all top, bottom, left, right percentage.