When giving a presentation with a projector it is sometimes better to use a dual screen layout instead of a cloned display. If you still want a preview of the projector screen on your primary screen, you can do this:
Install x11vnc
and a vnc viewer (e.g. xtightvncviewer
).
Connect the projector.
In your system display settings, move the projector to the left or your primary screen (not strictly necessary, but I had weird clipping issues otherwise).
Start a vnc server for your second display with
x11vnc -clip xinerama0 -scale 0.8
(or xinerama1
for the second screen etc).
You can control zoom with the scale
parameter.
Show the screen using vncviewer
. Enter localhost
as the server.
Get accustomed to how this behaves. Mouse movement is a bit weird, because your cursor will jump to your second monitor, as soon as you enter the vnc display.