Tried my luck at Ubuntu section but no reply.

I am a newbie to Ubuntu. I wanted to try out KDE and followed this guide http://www.psychocats.net/ubuntu/kde

Managed to get it install but when I log-off, I don't have the option to choose between KDE/GNOME. I manually go to login options and change the default GUI to KDE. Now I am stuck with KDE, how do I change it back? On KDE I don't see the same option to switch back to GNOME.



This option is missing on my side

My login page just like the picture I attached but I don't have the option to choose GNOME/KDE like the picture.

Now I am stucked with KDE and don't know how to switch back to GNOME.