verticalAlign property
The vertical alignment of the legend box. Can be one of top,
middle or bottom. Vertical position can be further determined
by the y option.
In the case that the legend is aligned in a corner position, the
layout option will determine whether to place it above/below
or on the side of the plot area.
When the layout option is proximate, the
verticalAlign option doesn't apply.
API Docs: https://api.highcharts.com/highcharts/legend.verticalAlign
Implementation
String? verticalAlign;