If you have Irlen Syndrome or prefer white print on a black background you are going to love this option on your MAC computer. Just click on the Apple button at the top left of the screen. Single click on Universal Access. Choose display white on black. That’s it. You can adjust contrast if you like, but I found it to be just right. The shortcut to accomplish this is to hold down control, option, command and hit the 8 key. I have been trying to figure out how to do this on my old PC for years! The only downside to this feature is that images and videos have distorted colors. I must thank Anthony Bach, a senior from Dexter High School, for reading my blog as suggested as a coworker, for his suggestion that the Mac operating system allows viewing the screen in reverse. I also thank Noah at the Apple Store in Ann Arbor for the instruction of how to use the shortcut to accomplish this.For me, even after correction with tinted lenses, using this feature feels like I am using a translator feature to read the printed word.