PC to TV on an acer F5 Key??

[rstratf]

Hi
I have connected a Samsung DNIe to my acer 5100, correct resolution etc... The desktop shows on the TV but i cannot get the F5 Ket to work so that i can get the Extended desktop to show. Fn key works with other Function keys, so don't think it is the keyboard. Can anybody help? Thanks

 

[Sunius]

Try pressing a combination of Win+P keys.

 

[rstratf]

Thanks for replying.... tried that, but does not do anything. Think now the settings on the Graphics card (ATI Radeon) may have disabled the toggling function on F5 key and you have to set display mode via the ATI settings. Trying that now.
thanks again