For 3 and 4, this seems to make it possible: https://kitchingroup.cheme.cmu.edu/blog/2017/01/03/Find-stuff-in-org-mode-anywhere/ https://kitchingroup.cheme.cmu.

For 3 and 4, this seems to make it possible: https://kitchingroup.cheme.cmu.edu/blog/2017/01/03/Find-stuff-in-org-mode-anywhere/ https://kitchingroup.cheme.cmu.edu/blog/2017/01/03/Find-stuf... I, for one, will now go down this rabbit hole ...