> how come I can trivially change brightness on a laptop monitor but none of my desktop screens? In Windows I'm using a free app called Twinkle Tray that sits

> how come I can trivially change brightness on a laptop monitor but none of my desktop screens? In Windows I'm using a free app called Twinkle Tray that sits right in the Taskbar and you can use the mouse wheel or click it to increase/decrease the brightness. In Mac I use Brightness Slider, also free. These apps have been life savers!