In the PageViewCountData is data produced separately. The produceDataset method returns a XYSeriesCollection();
The chart is displayed the right way with this data.
I copied the buttons from the example ( zoom by number) . I can zoom on the y-axis, and the zoom factor is working, but I cannot zoom on the x-axis.
Do you mean putting a label on a particular (X,Y) position
yes, that's what I want to do.