HighCharts - How can I turn off the points?

Here's an example with a line chart: http://jsfiddle.net/aeZ6P/1/

Important part:

plotOptions: {
    line: {
        marker: {
            enabled: false
        }
    }
}

See also: https://api.highcharts.com/highcharts/plotOptions.line.marker.enabled

Same effect with spline: http://jsfiddle.net/aeZ6P/

In Highcharts we have three ways to disable markers:

1) Disable for all series by type:

plotOptions: {
    line: { /* or spline, area, series, areaspline etc.*/
        marker: {
           enabled: false
        }
    }
}

2) Disable for one specific series:

series: [{
    data: [14,17,21],
    marker: {
       enabled: false
    }
}]

3) Disable marker for a certain point:

series: [{
    data: [{
        y: 14,
        marker: {
            enabled: false
        }
    },{
        y: 17
    },{
        y: 21
    }]
}]

Take a look at this from the HighCharts API reference:

http://api.highcharts.com/highcharts#plotOptions.series.marker.enabled

http://jsfiddle.net/gh/get/jquery/1.7.2/highslide-software/highcharts.com/tree/master/samples/highcharts/plotoptions/series-marker-enabled/

The options you need to add are this:

    plotOptions: {
        series: {
            marker: {
                enabled: false
            }
        }
    },

This method is nice as it will work with all charts with the point markers. If you want a specific chart type, check this out:

    plotOptions: {
        line: { // <--- Chart type here, check the API reference first!
            marker: {
                enabled: false
            }
        }
    },

Enjoy!