Just what I was looking for

I have rMBP and often use SystemPref -> Display to toggle between the middle resolution and the right hand resolution. I wanted a way to quickly switch between these from the Menu Bar. Not sure why apple doesn’t let you do this in the first place but this is the next best thing. You must buy the $2 IAP to get the retina friendly modes but that’s worth it IMO.

sneeden about Display Menu