如何在图表的右侧放置Highcharts标题？

var chart = Highcharts.chart('container', {
    chart: {
        type: 'column',
        width: 500
    },
    ...
});

chart.setTitle({
    text: '图表标题',
    align: 'right'
});

chart.setTitle({
    text: '图表标题',
    align: 'right',
    x: -20
});

var chart = Highcharts.chart('container', {
    chart: {
        type: 'column',
        width: 500
    },
    title: {
        text: '图表标题',
        align: 'right',
        x: -20
    },
    ...
});