Designed with retina displays in mind, Resolutionator may also bring additional capabilities to your non-retina display, but we can't guarantee that. So we suggest everyone try the demo before purchasing, to make sure Resolutionator works well with your display(s).

Switch via the menu bar
If you're a menu bar utility person, Resolutionator's pre-set for your preferences: It ships in menu bar mode, giving you quick mouse fling-and-click access to all your resolutions.

Switch via the keyboard
If you prefer the keyboard, assign a hot key of your choosing and switch resolutions via this handy pop-up panel:
It may appear you can only switch resolutions on one display, but fear not! Tap the left arrow to reveal all attached displays; you can then change the resolution on any of them from that same panel.

See even more pixels
Depending on your display, OS X may offer three to five resolution choices; these are the choices you'll see by default in Resolutionator. If that's not enough for you, though, Resolutionator can show all the resolutions your display reports it's capable of producing, as seen in the movie at right. Just tell Resolutionator to show non-retina and/or silly resolutions in its preferences, and you'll see—depending on your display's capabilities—many more available resolutions.

Requirements: OS X 10.8 or later

Home Page - https://manytricks.com/resolutionator/