If it's a longer post, I rarely compose directly in the CMS, and never in Known.

I typically type up my posts in an editor (anything will do really), and save the file in a folder that I keep on Google Drive. I normally don't format a lot of my text, so that makes it easier. It would be marvellous if I could get Markdown to work with Known though, because I'm familiar with that, and that would allow me to compose no matter which application I'm typing up the content.