Hi Heber. I appreciate the response! I don't know for sure what Kreo does, but it doesn't seem to be just inverting colors--the page background is a little lighter than plain black, and the drawing...

I second this! I'd love a dark/night mode option. I'm coming from Kreo, which has a night mode that looks great (it just feels buggy and slow in comparison to zzTakeoff, and it's double the price).