If you are stumped by even that basic request, then you need to get yourself a 'beginning Linux' book. Trust me - you will never get an answer from this forum on how to use the graphical configuration tools - you will always be directed to the command line and you need to be able to use it.
You could read this:
http://www.icon.co.za/~psheer/rute-home.html
It will tell you just about everything you ever need to know, in highly smug and patronizing tones!
TIM