Synaptic scroll increase size

I’ve been going through the /etc/gpm/syn.conf for some setting to make the scrolling area wider but I cant seem to find it. I have one of these ugly rounded touchpads on this laptop which makes the scrolling area very narrow. I also looked through the documentation in /usr/share/doc/packages/gpm/README.synaptics but they really don’t match the actual settings very good, there is a lot missing.
Does anyone know what I would have to do to widen the scrolling area?