Lost my piano roll, mac, Z button

[cleversheep]

So I accidentally pressed the Z button on my mac and the view gradually zoomed out and the side piano roll has dissappeared.
What is the opposite functional counterpart to the Z function so I can zoom it back in? and how do I toggle the piano roll back on or off?

[jean-emmanuel]

Shift+Z should do the trick. To show the pianoroll you need to increase the track’s height until it appears.

[plectrum9999]

Also, you can press f on a midi track to expand to max height.