Fast User Switching

Hey, mainly I use my computer, but when my friends come over or other people use my computer, I set up a guest account called 'My Friends'. Since I'm always on mine, When they come I switch it to theirs so they wont go through my stuff and mess something up because nobody in my family or friends knows macs. So anyway to the point:

How do I turn on Fast User Switching?

Wait nevermind, I found it.

Go ahead and post what you found, so that others who have the same question can search for your answer Thanks!

System Preferences>Accounts>Login Options
Enable Fast User Switching.