2/3 view is a new design paradigm in ForeFlight on the iPhone that allows you to access information about map elements without losing sight of the map itself. When combined with Single Tap (https://youtu.be/iExJo2jiSrk) and Aeronautical Maps (https://youtu.be/_bPcRMmjEwU), 2/3 view becomes a powerful tool for flight planning. 2/3 view also works with the tap-hold gesture, as well as the Map Settings menu, allowing you to see what changes you're making to the map without closing the menu.