These pages outline the chart configuration options, and the methods and properties of Highcharts objects.
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Enables zooming by a single touch, in combination with
chart.zoomType. When enabled, two-finger pinch
will still work as set up by chart.pinchType.
However, zoomBySingleTouch will interfere with touch-dragging the
chart to read the tooltip. And especially when vertical zooming is
enabled, it will make it hard to scroll vertically on the page.