"Document font" preference

["Gustavo J. A. M. Carneiro" <gjc inescporto pt>]

  In my font preferences I see a "Document font" option.  It affects the
gconf key /desktop/gnome/interface/document_font_name, which is
documented as "Name of the default font used for reading documents".
However, changing this font seems to have no effect on any GNOME
application.

  Two question:

    1- why does this preference exist if not used?

    2- Can I use it in my application, or is it deprecated?

  Thanks,

-- 
Gustavo J. A. M. Carneiro
<gjc inescporto pt> <gustavo users sourceforge net>
The universe is always one step beyond logic