I am using a Mac and cannot work out how to zoom in and out on the piano roll. The only reference I can find is CTRL + Mousewheel - Horizontal zooming (mouse-centered)
The Apple mouse does not have a scroll wheel, are there keyboard shortcuts for this?
Exactly as you say, but for some reason nothing happened. Having said that I just worked it out. On PC CTRL is used, just by chance I used CMD and problem solved. Many thanks for your quick response.