Carsten Dominik <dominik@uva.nl> writes:

> No that should happen automatic.

Here's the complete document:

* Top
  :PROPERTIES:
  :COLUMNS:  %40ITEM(Task) %Effort(Estimated Effort){+}
  :END:
** First
   :PROPERTIES:
   :Effort:   2
   :END:
** Second
   :PROPERTIES:
   :Effort:   3
   :END:
** Third
   :PROPERTIES:
   :Effort:   40
   :END:

Pressing C-c C-x C-c, then `c', produces the following layout: