Mac OS X - how to darken screen?

Andre Garzia andre at
Thu Sep 16 21:41:30 EDT 2010

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

On Thu, Sep 16, 2010 at 10:32 PM, Phil Davis <revdev at> wrote:

>  I want to darken my Mac screen (not just a stack window) the way a slide
> presentation would do it at its beginning, and then bring it up again to
> reveal what has been changed. Does anyone have an AppleScript or a shell()
> command for this that can be run from Rev?
> Thanks!
> --
> Phil Davis
> PDS Labs
> Professional Software Development
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