Mac OS X Lion: how to exit Terminal full screen mode

• Use key combo: command + option + F can enter/exit full screen mode when you are using Terminal.
• Alternatively, use the mouse: 
• To enter full screen mode: click the top-right corner icon of the terminal window
• To exit full screen mode: mouse over the top for a while, system menu will appear, you can then select "View" -> "Enter Full Screen Mode"