Though there are many blog posts available to show how to enable Maximize, Minimize buttons on the title bar in Gnome 3, this post is for my personal reference ;).
As you know, there will be no title bar controls for minimize, maximize/restore. To enable them, open up the terminal and type in (or copy/paste) the following command:
I prefer the buttons to be in right corner.
gconftool-2 –set /desktop/gnome/shell/windows/button_layout –type string :minimize,maximize,close
Now, press Alt+F2, type in “r” without quotes and press enter. This will reload Gnome-Shell and the changes will come into effect.
If you login with fallback mode, you may still find the icons showing at left.
$ sudo apt-get install gconf-editor
Press Alt+F2 to bring up the Run Application dialog box, enter “gconf-editor”
The key that we want to edit is in apps/metacity/general
Change the text in the button_layout key Value text field to:
Phew, We are done.