textAlign property
The text alignment for the label. While align determines where the
texts anchor point is placed within the plot band, textAlign determines
how the text is aligned against its anchor point. Possible values are
"left", "center" and "right". Defaults to the same as the align option.
API Docs: https://api.highcharts.com/highcharts/xAxis.plotLines.label.textAlign
Implementation
String? textAlign;