Got the answer from https://ask.fedoraproject.org/question/7482/fedora-17-using-gnome-3-how-to-enable-the-maximize-minimize-of-window-border/
I know 2 methods:
Using gnome-tweak-tool (Shell >> Arrangement of buttons on the titlebar)
Using dconfHere are some dconf examples
Only the close button on the left side (i prefer this)
dconf write /org/gnome/shell/overrides/button-layout '"close:"'Minimize, maximize, close on the right side
dconf write /org/gnome/shell/overrides/button-layout '":minimize,maximize,close"
Change theme: answer from http://community.linuxmint.com/tutorial/view/1148
run: "dconf-editor", navigate to org > gnome > desktop > wm > preferences and change the "theme" value from "Adwaita" to any other installed theme you want. Remember this because in the same place you can also change the window button layout, among others.