Switching Source on a Monitor with no Source Button?

[Kosmiche]

I have a Acer S236HL http://us.acer.com/ac/en/US/content/model/UM.VS6AA.001

I have my pc and ps3 connected to it using hdmi, I was wondering if anyone might have a idea how to quickly change source so I can go from pc to ps3 easier than going to menu, going to settings and manually changing the hdmi output?

I have emailed them but so far received no response.

Thanks, not expecting anyone to have experience using this monitor I was just wondering if anyone could have a educated guess at how to quickly change source.

 

[PiKe]

Tried every button except the menu one? There's usually a button that does source!

 

[Kosmiche]

Theres 6 buttons which are colour preset button, auto button, menu button, volume down button, volume up button and power button.

No source button. I had not thought of this problem before buying the monitor

 

[Kosmiche]

Just thought perhaps theres a way I can do it with a keyboard command or something? Or will my pc not recognise I have a ps3 connected to the monitor.