ST2310 - Mannually change input

I have an ST2310.

I I have my computer hooked in by DVI and a PS3 with an HDMI cable. 

Is there a way, with this monitor. to manually switch between the two inputs without having to unplug one or the other each time. 

When I turn it on it a message pops up:  Auto select  and the default seems to be the DVI (computer) input. 

Is there a manual mode?

I'd like to do it without having to get a switch box.

Thanks