I have RedHat9 installed, and Ii want to change its display settings because icons, browsers etc are to big. I went into display settings and found that the current settings were at 800x600, i want to change this to 1024X???, when i changed it to 1024x??? it said log out and restart xServer. When i logged out and then logged back in, the settings were still at 800x600!! what did i do wrong? what must I do for this settings to take effect? What is this xserver restart?

Have a look through your X config file (/etc/X11/[XF86Config|XF86Config-4|xorg.conf]) for lines that look something like:
Subsection "Display"
Depth 16
Modes "800x600" "640x480"
EndSubsection
There should be a subsection for each colour depth. The first resolution mentioned is the default one (ie above it would be 800x600). Add 1024x768 to the beginning of the list so it reads:
Modes "1024x768" "800x600" "640x480"
You may want to do this for each colour depth.
FYI you can toggle between all the available resolutions with Ctrl&Alt&[+|-] (NB That is + or - on your numeric keypad and not by the backspace key)

Restarting your X server (the bit that provides a GUI) is as simple as Ctrl&Alt&Backspace.
 

Redhat 9.0 and later use the file named XF86Config (no "-4") make sure both the video card and the monitor section have all the resolutions your video card and monitor support. Also make sure the vertical and horizontal refresh rates match that of your monitor.

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