Implement dark mode and white ink
If you can implement dark mode with different color options like white and yellow will do the difference. You can think of different color options for pages. Just try as a trail and test them.
@Mayle: I would hope that this only applies to our android devices and that the software is smart enough to flip the colours back to black on white if we exported to PDF. Dark Mode would help us save on power while making notes and make the program much easier on the eyes. This is a must-have for me.
You can already do that by selecting a blank page and then choose background color. With that said, allowing a global dark theme on backgrounds with grid lines would be better.