Project window position cursor moves way to fast

Hello all. I’m new to Cubase 10.5.5

All of a sudden, I’ve done something so that the position cursor (playback head?) is moving along at light speed.

It zings left to right many times fast before I see (1.2) in the ruler then many more times and I see (1.3) etc.

What have I done and how can I fix it back to normal?

Thanks . . . Dave

Wow I discovered what I did.
I had inadvertently Zoomed in ! Pressed the G key several times and all is well.