Thanks for the advice! We thought it should be quite clear from the the image what it does. But probably you are right. We should make an animated gif.
It may just be me, it's 10pm and I've only had 2 coffees today.
It could be useful for study notes, programming notes (and code), project planning. It's like a simple Markdown text, but you can nest one Markdown text block to another. You can fold branches you don't need now.
I see. So kind of an outliner meets markdown?
Yes, or maybe markdown meets mindmap
It would be better if there was something to try out or play with because that is the spirit of 'Show HN'.