Projection Question

Ian Wood revlist at
Fri Mar 31 06:20:00 EST 2006

OK, multiple monitor basics:

In mirroring mode, what you see on the second monitor (in this case a  
projector) will be identical to what you see on your laptop. This is  
what most people use when plugging in a projector, in some cases  
becuase their hardware can't do anything else. In this mode there  
will be NO way to send anything different to the projector.

Extended Desktop (may be called something else on Windows)
This is not available on all computers, especially lower-end laptops.  
Instead of just duplicating what is on the laptop screen on to the  
second monitor, it is treated as extra space in addition to the  
laptop screen. Individual windows can simply be dragged across from  
one screen to the next,. The virtual position of the screens can be  
altered - side-by-side, one above the other (dragging a window off  
the bottom of screen A brings it onto the top of screen B) etc.

If the graphics card in your laptop supports this then you are in  
luck - simply have two (or more) stacks, with one positioned on the  
second monitor/projector, with what appears on it controlled from  
your 'control' stack that you keep back on the laptop screen. This is  
effectively the way that most better presentation apps work, such as  
PowerPoint or Keynote - controls/info on a screen that the audience  
can't see, the actual presentation on the projector.


On 31 Mar 2006, at 11:09, John Miller wrote:

> Ian,
> Thanks for taking time to respond.  I'm not sure I understand.  I  
> am using a laptop that only has one screen.  Is there a way to send  
> just a portion of the screen to the projector while continuing work  
> on the rest of the screen?
> Thanks,
> John
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