Thanks again and a comment: What I wanted was just to hide the rest of the file to help of focusing on the item at hand (project in this case). The C-x n s does the job in this case (with C x n w to get back to the full view).

Marcelo.

On Mon, Nov 9, 2009 at 10:36 PM, Marcelo de Moraes Serpa <celoserpa@gmail.com> wrote:
Thanks.


On Mon, Nov 9, 2009 at 6:26 PM, Andreas Burtzlaff <andy13@gmx.net> wrote:
Hello Marcelo,

On Mon, 9 Nov 2009 18:03:58 -0600
Marcelo de Moraes Serpa <celoserpa@gmail.com> wrote:

> Hello list,
>
> The sparse-tree feature is very useful when you want to follow tasks of a
> specific project, and want to filter the whole org file to show only the
> relevant project tree. However, I did not find a way to apply this function
> to a specific tree at the cursor point. Sometimes, I want to act by project,
> and I know exactly where it is in the file, and I want to apply the sparse
> tree at this item, instead of searching by regexp, todo, etc. Is it
> possible?

Yes, that is possible by narrowing to the subtree.
While on the heading for the subtree you want to apply the sparse tree
function on press:
C-x n s     (to narrow to the subtree)
C-c /
C-x n w     (to widen the view to the whole file)

HTH

Andreas