Garageband Chord Viewer

Hi there,

I used to be able to plug my MIDI keyboard in and play a chord and instantly see the chord being played on the top display thing that's right under the project name. I haven't used garageband in a few months, but I came back to play my keyboard today and I can no longer see then name of the key or chord being played. How do I get this back? The only thing I can think of is the tuning fork icon, but I'm not sure that's what I need and it is also greyed out.

Thanks!