I am not sure if this is the proper place to make this suggestion, and I 
know you are working hard, but there is a thing about /org-num-mode/ 
that I miss since day 1.

To be a better asset in reading or studying directly from org-mode, I 
think it could be a good addition the numbered headlines to be 
positively determined. Now they can just be excluded (UNNUMBERED or 
skipped), one by one.

For example, it would be helpful to use a PROPERTY like "*NUMBERED*" 
that would make /org-num-mode/ to affect just to the desired headlines 
and sub-headlines (inheritance is a good thing). Or if there is a 
*narrowed headline* to get numbered just what is on the screen.

Problem: Now when I read some of my notes, I get things like this:

/22.81.12.1./ Where just the /12.1/ would be useful to the reading 
(chapter 12, point 1), since the 22.81 is from unrelated notes to the 
studying.

This happens too with book notes: the numbering of the headlines could 
even be the same than the numbering of the chapters of the book.


Best regards,
Ypo