How to restore macOS screen from inverted black and white blurry mode?
Was trying to increase the size of the letters, but instead, the letters became smaller, the screen is now a negative black and white with tiny letters in white. Was able to increase size of letters a bit, but nothing else. If I try to upload some instructions, these are superimposed on top of each other and cannot close them. A simple Undo Button wd have saved me 3 whole days and nights of trying to fix this. Unfortunately, this new technology is definitely not for the average computer user still have High sierra.
[Re-Titled by Moderator]
iMac 21.5″, macOS 10.13