How to run an app on a secondary monitor

[Amichai Rotman]

Hi,

I am about to participate in a computer fair at the local mall. I'd like to
use only my netbook as my computer.

I want to use the internal LCD for my own work and at the same time connect
an external LCD monitor that will face the visitors, where I can run
presentations and videos of my products.

Cany you tell me how to set it up?

I am guessing I have to set up the D-Sub as a separate X display,  but I
have no idea how to do it...

Thanks!

Amichai.
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