Waveform moved up to top of track, can't get it back

Hello!

The blue waveform line occasionally moves up to the top of the track through something I accidentally do with the trackpad on my laptop and I haven’t found the way to move it back down again. It makes it really difficult to work with the track since I only see half of the line, the upper half disappears. There must be a way to get it to move back to the centre of the track, but I haven’t found it … can someone please help?

Am using OS 12.4 and Audacity 2.3.3.

Thanks!

zoom reset.gif
https ://manual.audacityteam.org/man/zooming.html#vertical