Install GNOME Tweak Tool on ubuntu

Open the terminal and run the following commands

sudo add-apt-repository ppa:ricotz/testing
sudo apt-get update
sudo apt-get install gnome-tweak-tool

Screenshots







 



source: http://www.ubuntugeek.com/gnome-tweak-tool-a-tool-for-changing-specialised-or-advanced-gnome3-settings.html