Evince (and many other PDF viewers) have a "Blank Screen" Feature, that shows a black screen when activated. The idea is that the audience shouldn't be distracted by the presentation when showing stuff on the white/black board or so.
The default key for this command is ".". Which is exactly what the Logitech presenters R400/R800 issue when pressing the "blank screen" button. This works without configuration, out of the box with evince. It would be nice if pdfPres supports that too. :-)
Here is the xev output when pressing the button the the R800:
KeyPress event, serial 29, synthetic NO, window 0x4200001,
root 0xb2, subw 0x0, time 1116536, (1180,374), root:(1182,400),
state 0x0, keycode 60 (keysym 0x2e, period), same_screen YES,
XLookupString gives 1 bytes: (2e) "."
XmbLookupString gives 1 bytes: (2e) "."
XFilterEvent returns: False
KeyRelease event, serial 29, synthetic NO, window 0x4200001,
root 0xb2, subw 0x0, time 1116696, (1180,374), root:(1182,400),
state 0x0, keycode 60 (keysym 0x2e, period), same_screen YES,
XLookupString gives 1 bytes: (2e) "."
XFilterEvent returns: False
Evince (and many other PDF viewers) have a "Blank Screen" Feature, that shows a black screen when activated. The idea is that the audience shouldn't be distracted by the presentation when showing stuff on the white/black board or so.
The default key for this command is ".". Which is exactly what the Logitech presenters R400/R800 issue when pressing the "blank screen" button. This works without configuration, out of the box with evince. It would be nice if pdfPres supports that too. :-)
Here is the xev output when pressing the button the the R800: