Fedora17 installation and add maximization button

After fedora17 is installed, there is no minimization button in all windows. Now add the minimization maximization button for fedora17.
1: Install gnome-tweak-tool and gconf-editor,

Yum install gnome-tweak-Tool
Yum install gconf-Editor

2: press Alt + F2 and enter gconf-editor. Then, add: Minimize (minimized), maximize (maximized), close (disabled) to/desktop/gnome/Shell/Windows/button_layout ), add as needed, and click "OK" to save the store.
3. press Alt + F2 again, enter R, restart gnome-shell, and you will find the button you want to add more.

What is simpler than step 2 is: activities directly searches for advanced setting Shell
Arrangement of buttons on the titlebar select all.