Hello,

Marco Wahl <marcowahlsoft@gmail.com> writes:

> Just one idea came to my mind.  What about adding an option to restart
> the numbering at 1 for the first heading in the case when narrowing is
> in effect?

AFAICT, detecting narrowing changes requires using `post-command-hook'.
Therefore an update to numbering, when such change happens, might get in
the way, e.g., if it slows down input.

Anyway, here is a POC, if anyone wants to test it.

Regards,

-- 
Nicolas Goaziou