[plt-scheme] slideshow with multiple displays

Hi,

continuing with my Slideshow tests, today I connected my laptop to a
projector setting it as a virtual desktop. The result is that the
slides are centered in the middle of the virtual desktop and I don't
know how to move them (screenshot attached). The idea was to have the
comments window in one screen and the presentation in the projector.

I know this is possible (jfp05-ff.pdf - 4.6 Display Interaction), but
I don't know if I'm missing something.

Thanks in advance,

Aleix

PS: my last message is waiting for moderator (attachment too big).
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