I was recently browsing through tips & tricks for Mac OS X and I ran across a trick for inverting colors on a display and a monitor. You can use the 'inverting colors' function as a photographer on Mac OS X during editing and post-production. For example, if you have a bright picture or a picture with a big area with bright colors (for example the white color) and you need to locate, edit, heal and clone out dark spots (sensor dust, airplanes, birds, etc.), inverting colors can be very handy, especially when your eyes feel tired in finding these little spots. Inverting colors in post-processing in such situations is just perfect because its much easier to find bright spots on the dark background rather than the opposite.
In order to invert colors in Mac OS X press Ctrl+Option(Alt)+Cmd+8 and your colors are inverted. To return to the normal color scheme, press the same keys again.
Article Picture: I went to the China Town when visiting Antwerp in 2010. This red Chinese lamp really stood out of the background and the environment.