Is it possible to connect narrowing to tree demoting? I'm not sure that I'm
using the right terminology so I'll give an example.

Entire journal:

* 2010
** Jan
*** <2011-01-03 Mon>
**** Todays agenda
***** Do this
***** Do that
**** Meeting
*** <2011-01-04 Tue>
**** Todays agenda
***** Do this
***** Do that
**** Meeting

Let's say that I'm narrowing to <2011-01-04 Tue>, I'd prefer seeing it like
this:

* <2011-01-04 Tue>
** Todays agenda
*** Do this
*** Do that
** Meeting

Thanks!
Dov