html, body, #container {

    width: 100%;

    height: 100%;

    margin: 0;

    padding: 0;

}

anychart.onDocumentReady(function () {

    var chart = anychart.line([6, 10, 18, 11, 9]);

    chart.yScale().minimum(0);

    chart.xScale("linear");

    chart.annotations([{

        type: "ellipse",

        xAnchor: 1.9,

        valueAnchor: 17,

        secondXAnchor: 2.1,

        secondValueAnchor: 19,

        fill: "#673AB7 0.5",

        stroke: "3 #FF9800"

    }]);

​

    var annotation = chart.annotations().getAnnotationAt(0);

​

    // Get Y-scale.

    var scale = annotation.yScale();

    scale.inverted(true);

​

    chart.title("Get and modify Y-scale.");

    chart.container("container");

    chart.draw();

});