Waveform box

How to switch to smaller and slim box?

When I open N-Track. A wide and large box for my waves.
But I want to have a slim one to see the 3 or 4 tracks at the same time.
Don’t know why sometimes it comes with small ones, others with larger ones.

Play with the magnifying glass buttons on top bar… + - bigger smaller.

Also the one that shows all song.