Brightness is important in everything from phones and computer displays to TV screens and video boards. Bring your laptop or phone outdoors and you will realize that the display is nothing but shadows ...

Your MacBook does not know better than you. Apple's macOS has an infuriating habit of automatically changing the computer's screen brightness level, seemingly at random. No, it's not all in your head.

Other than when you've enabled the AssistiveTouch feature on your iPad or iPhone, there shouldn't be a bright spot on your iPad or iPhone screen — one that stays in its place, no matter how much you ...