Making controller lane bars taller

Could somebody tell me how to make volume bars (CC 7 or 11) in a track’s controller lane taller so its easier to edit them ?

Mine are way down at the bottom and tiny so there’s no way adjust their relative heights.

I’ve tried zooming and it just doesn’t work. The general volume level is OK but I just need to adjust it some up and down. But with the bars down at the bottom I can’t do it.



Hover over the top line of the controller you want to make bigger and the cursor changes to the up/down arrow, you can then adjust the size.