This event is generated when the user is in the Zoom in/out mode (see Toolbar) and presses on the right-mouse button over the plot area. Use this event to perform operations before a zoom-out is performed, that is, before the chart is redrawn with the new zoom-out settings.
'XYChartCtl1 is the name of the XY Chart control instance placed on the form
Private Sub XYChartCtl1_ZoomOutSelected()
XYChartCtl1.Profile(1).SampleStep = 2 'Display every other value for Profile 1