How did I turn off "what am I looking at"?

[TheCurmudgeon]

Ok maybe I am mistaken but when you look at blocks didn't it tell you what you were looking at?  Is so can you tell me what key I hit by mistake to turn it back on.

Thanks

[l33tmaan]

I think it's N. Or B. Probably N.

[Gerritt McGill]

Default is the B key, I believe