Hi

 From the first day, I liked org-num-mode, but I think that its default 
which numbers all headlines could be problematic.

Right now it only has the options to exclude headlines from being 
numbered, so it could be necessary to modify a big amount of headlines, 
for numbering just a tree.

I think it would be helpful to have a "positive" way to numbering 
headlines, for example "NUMBERED" keyword, while all the other headlines 
stay unnumbered.


Bests