Keyboard assignable command for changing lane heights?

As far as I can tell, the only way to adjust the height of a track’s lanes is by manual dragging. Is this correct?

Actually, no. You can use these key commands, even if they work the same way for both regular tracks and eventual lanes existing in them :

You can also use the ctrl + arrow up/down keys for the same task.

Ok, that’s something to work with.

The only disadvantage is that this one does not take into account selection, meaning all tracks & open lanes increase/decrease to the same height.

But it’s something, nonetheless.

It’s the case if you use the key commands, but not when using the ctrl + arrow up/down shortcuts, at least here : in the latter case, whether track(s) or a lane(s), the shortcuts is applied only for the selected object(s).