how to zoom the second scale in two_scales.py (gtk)

Community matplotlib-users
1

Hi

I'm currently playing with twinx() and would like to compare graphs, and zoom details.
In two_scales.py demo, it is possible to move the left y scale but not the right one: The sinus stays between -1 and 1.
Is it possible to switch the zoom scale selection?
If I add a button, what should I call?

What if I want to add more y scales, is it possible?

Thanks