The Status Bar is just below the Toolbar in the Geometry Window.
Here the Status Bar tells us that the distance between selected vertices 2 and 6 is equal to 2.0 wu (wings units). This is just one example of the kind of useful information to be found in the Status Bar. The Status Bar changes automatically to display relevant information about selected elements or helpful comments during complex modeling operations. Keeping an eye on the Status Bar is important as it gives you valuable information about the status of an operation while manipulating elements of geometry. It displays this information in Degrees(°) for rotations, as a Percentage(%) during scale operations, and in Distances(D) for movements in Wings Units (wu).