how to modify screen resolution?

[Eric Lin]

Dear debian or progeny users:     I have a screen on my max capabble 1024 786 14 inch monitor, after I choose medium and 14 inch at install of progeny1.0,      it divided to three divisions horizontally, it work good at redhat7.2 at 800 600 mode.   how can I let it back to that mode as rh7.2?  or can I paste the x-config file from rh7.2 to p.d.1.0?     hoep to see some 's help, thanks in advance, eric