[Evolution] mouse wheel scoll amount

[simran <simran list reflectit com>]

Hi All, 

Can anyone please point me to where i can configure how many lines are
scrolled on each mouse wheel scroll...

I have tried to find the settings in gnome2 but have not seen anywhere
where i can configure this, and have not been able to find them in
evolution either... 

thanks,

simran.

ps: I'm using 
        * gnome2.2
        * Linux - Debian (sid)
        * Evolution 1.4.0