When I use the zoom feature of the NavigationToolbar, the
> xaxis is shared between all 3 graphs. But the yaxis
> limits are free. Obviously, they could also be shared but
> this is not want I want. I would like to "force" or
> "freeze" the Y axis to a given value. Consequently, the
> zoom feature would act only along the X axis.
When using the right mouse zoom in pan/zoom mode, if you hold 'x' down
the zoom will only be in the x direction. ditto for 'y'. It would be
nice to support this for zoom to rect as well. On the todo list!