setZoomBase() of QwtPlotZoomer with value of autoReplot scale of QwtPlot

[Uwe]

So my intention to set zoomBase with the sale of autoScale of QwtPlot, so that when I came back of zoom then I should be at scale of autoScale, not at default scale.

O.k. there is is QwtPlotZoomer::setZoomBase - but what is the question ?

Uwe