This chapter is from the book
Customizing Ubuntu’s Look and Feel
Click the Gear icon at the right of the top panel and select System Settings to configure and customize your system. You can find other settings in the Dash using the Applications Lens and the System filter. Feel free to customize anything you like, but pay attention to what you are doing so you know how to change it back if you don’t like the result. Chapter 6 has more information on customizing Ubuntu.