Thank you! That helped me too and it works well on my Boox Nova 3. I’m trying to move away from iPad/OneNote to a more open format. The Boox has the huge advantage of letting me work outside! The main setting for me seemed to be Other/Color/0 instead of 255. Switching the theme to light mode completed the job.
I’m not a big fan of dark mode being the default in applications, particularly mobile, although many people love it so it needs to be an option.