See image of what to click on. As you can see the menu bar can be on top, bottom, left or right. Doesn't matter, click whatever is closest to the left and a menu will pop out, go wherever the option then exist to edit system settings
image 1: http://linuxmint.com/pictures/screen...nca-2.2/08.png
(if your menu bar is at bottom)
Image 2: http://wiki.services.openoffice.org/...-startmenu.png
(if at top)
To learn your environment:
And it will be useful to read the link below in detail
It will save many people frustration, Complete your questions and don't keep repeating all the time. Point out in a detailed manner exactly what your issues are, use common sense in regards to positioning of the menu bar and where applications are entered.
There are many different flavors of linux and desktop environments and every person has their own way of tweaking things, so most help will always be general and applicable to the majority of systems, no one will help if things are unclear and you just assume everyone has a setup like yours.
If above fails look up howto for xorg and go edit the config files.