Install both software groups:

Installing the LXDE group also gives you Openbox. LXDE and Xfce pretty much looks like the Gnome Desktop with application menus and icons on the desktop, whereas Openbox reminds me more of the good old days, where every application launch started with right-clicking on the desktop.

To try these desktop environments out, click your username on the login screen, pick the environment you want in the Session pull-down menu at the bottom of the screen, enter your password and you’re all set.

Note: Openbox’ Logout menu item didn’t work for me, but Exit did the trick. If you get stuck, you can simply kill the whole graphics subsystem (Xorg) with CTRL+ALT+BACKSPACE.