Q: When I watched a streaming tv show like Under The Dome on my laptop, 11 inch Mac Book Air, OS X Yosemite version 10.10.4, in any dark scene like at night or in a dark room, I could not see anyone in the screen. Tried to brighten the screen, no luck..

How can I brighten the screen on my Mac Book Air, OS X Yosemite, version 10.10.4? It seems to be maxed out even though I can't see any one in a dark scene like at night or in a dark room in a tv streaming show like Under The Dome. I tried to configure to brighten the screen for the streaming tv shows or movies, no luck at all.