[CentOS] How to configure display on CentOS 6?

How exactly are you supposed to configure the display (i.e. set up X11) 
on a CentOS 6 system? I mean, in the past, there was 
system-config-display, but that's not supported any more. There is 
gnome-display-properties/System->Preferences->Display, but that seems to 
rely completely on auto-detection of the graphics card and monitors. 
What if this fails? Surely there should be a way to specify everything 
by hand?

Help, anyone?


- Toralf

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