Waveforms shift up

I’m on a Macbook Air, OS Venture 13.2.1. I’m having an issue I’ve had before. I believe I hit something inadvertently that causes my waveforms to shift upward so that I can only see the bottom half. I’m never able to rectify the situation except by rebooting. I have a feeling there’s a very simple fix.
Screenshot 2023-02-19 at 7.45.36 PM.jpg

Right-click in the vertical scale and choose “Zoom Reset”.

You got that display by clicking in the vertical scale.

– Bill

Thank you so much for your help, Bill!

Oh gosh this happens to me too!! Only everything slides down I believe…Anyway, hey Bill–
what if I can’t “right click”? I’m using a laptop…