Screen Burn in Issue...
I have an iMac (Retina 5K, 27-inch, Late 2014) and for the past few years I've noticed that I am getting alot of burn in around the edges of the screen. For example, when I moved the files I had here below, they left this burn in behind. It last a few min and then disappears. I am pretty positive I never had this happen for the first 5 or more years of owning the iMac and wondering why it's happening now? I have the same thing happen for title bars or apps etc.
Any help would be greatly appreciated. Thanks