Note Editor: Dark Mode
Add the ability to view the note content in a "dark mode" while in the note editor. White backgrounds would still be white but would look black while taking notes. This would allow for a comfortable note-taking experience in a dark environment while preserving the original content colors during printing and exporting.
For example, a traditional white background with black writing would appear as a black background with white writing while in this "dark mode".

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Volkmar Kellermann commented
This is a great Idea. Excalidraw is a good example for excelent Dark mode.
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Alexander Bauer commented
just use the Beta Version at Google Play, enable the preview version in the app and choose the Theme "black" in the settings
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Michele Angoscini commented
or, at least, some dark backgrounds, or custom backgrounds color