Setting a screen saver in openSUSE 11.2 running XFCE Desktop

I’m using openSUSE 11.2 XFCE Desktop. I can’t figure out how to setup a screen saver for it. After my PC is idle for 10 minutes, the screen simply goes blank. I’ve clicked the start menu and then the settings but the option to setup a screen saver isn’t there.

Please help me. :frowning: