Mac OS X - how to darken screen?

[Trevor DeVore]

On Sep 16, 2010, at 9:41 PM, Andre Garzia wrote:

> You can take a screenshot of the screen and manipulate it to darken  
> it.

A couple of caveats to be aware of.

This works if you have a single monitor. For dual monitors you will  
get most likely get bitten by bug #3926 (http://quality.runrev.com/qacenter/show_bug.cgi?id=3926 
).

I've also found the importing the entire monitor on OS X to be rather  
slow. The speed on Windows seems to be much faster for the same size  
monitor.

-- 
Trevor DeVore
Blue Mango Learning Systems
ScreenSteps: http://www.screensteps.com
Releasable Revolution Resources for Developers: http://revolution.bluemangolearning.com