Really enjoying what I've seen so far!
But there's a few things I was wondering; we can get a 'cheat sheet' for the markdown, but could we get one for keyboard commands, or UI features? Ctrl+N and Ctrl+F were pretty straight-forward, but I'm curious about all the other keys I might be missing out on.
If I hadn't spotted the screenshot of the collapsed sidebars, I would've never figured they could be collapsed, not to mention I had to try out quite a few different things before finding the right way to do it!