Nesting is the next on the roadmap once we get around to it. The Clojure for this is super complex, it was a ton of work making it "unbreakable" (as if). We're in a good spot to add it.

The nesting will actually "zoom" into the col you're putting it in and give you a new view, then you can zoom back out.

There IS a live HTML preview that you can actually see and drag your browser big and small.... but it's broke. Fixing it after work tonight.