Add the parameter lineWidthto the list series. See this jsFiddle code. Important code:
var chart = new Highcharts.Chart({
// some other code
series: [
{
name: 'Tokyo',
data: [7.0, 6.9, 9.5, 14.5, 18.2, 21.5, 23.3, 18.3, 13.9, 9.6],
lineWidth: 5
}, {
name: 'New York',
data: [-0.2, 0.8, 5.7, 11.3, 17.0, 22.0, 20.1, 14.1, 8.6, 2.5],
lineWidth: 15
}
]
}
Also see the documentation for possible options.
// EDIT
. jsFiddle. :
var chart = new Highcharts.Chart({
// some other code
series: [
{
name: 'Tokyo',
data: [7.0, 6.9, 9.5, 14.5, 18.2, 21.5, 23.3, 18.3, 13.9, 9.6],
// marker setting for all points in this series
marker: {
radius: 5
},
lineWidth: 5
}, {
name: 'New York',
// marker setting for second point only
data: [-0.2, { y: 0.8, marker: { radius: 15 }}, 5.7, 11.3, 17.0, 22.0, 20.1, 14.1, 8.6, 2.5],
lineWidth: 15
}
]
}