I see why this is not possible, given the text format of an org file. But I am
curious if people think it would be useful. This is a bit off-topic maybe, but
I’m imagining what I would do if I created something like org-mode using
another underlying format.
Example:
* Top
Some text under “Top”
** A level-2 heading
Text under level-2 heading
** Another level-2 heading
Text under the second level-2 heading
More text under “Top”
So if the level-2 headings were collapsed we would still see this.
** Could have more sub-headings here
More top level text, etc.