Ghosting help and question

[Lamarak]

I have a new 13 macbook pro and been reading about the ghosting issue. I know probably dumb question, but what key do you push to get the grey screen they are getting to show if your screen is ghosting Thank you for any help. This computer is a3 weeks old. Thanks

 

[maflynn]

Go to this website to test your display
http://www.marco.org/rmbp-irtest.html

Keep the image up on these screen for 10 minutes and then clock on the switch to gray link and see if you have any image retention issues