Hi

I am using a Thinkpad X200s with a Intel Graphic card which supports
dual screens. I have installed first Kubuntu 14.04 and then trinity on
top of that (I know this approach is not recommended. It would have been
better to use the trinity Live CD, but I don't want to reinstall
everything).

Now I found out about dspdfviewer which allows (for beamer latex
generated pdf) to show the transparencies in two screens.

I tried that out with my laptop being connected to a external LCD
screen, however my laptop screen only was cloned and the dspdfviewer
developers told me to try out extended desktop mode.

I looked up a bit the trinity kontrol center but could not find anything
relevant.

So a pointer would be very well come. I would not mind a link to a
command tool such as xrand (which was recommended to me as well).

Thanks

Uwe Brauer