Many thanks - but this only has a similar effect to toggling Fn F7, namely the video will only play on the primary display (either the projector or the laptop screen, not on both at the same time) - it has been possible to play video on both at the same time on other laptops, and (I thought!) previously on the Z1RSP. Hmmm.... So, is the conclusion that it is not possible to play video simultaneously on the 2 displays, on this laptop?
Many of us use laptops for presentations, and this is a bit messy (I already have to drop the display resolution to 1024 x768 of course, prior to a presentation).
