In Mavericks, I can't find a way to have the Monitor Display options show in the Toolbar, as I could in OS X 10.7. I like to be able to adjust the brightness, and mirror windows, directly from the toolbar. Does anyone know how to make this work? (I'm on a MacBook Air.)
Get this tool - it's free, and works great - it also solves some other problems, like identifying external monitors correctly. Put it in your login items. A little icon will display in your top right menu bar - everything just works from there.