staticScale property
For vertical axes only. Setting the static scale ensures that each tick unit is translated into a fixed pixel height. For example, setting the static scale to 24 results in each Y axis category taking up 24 pixels, and the height of the chart adjusts. Adding or removing items will make the chart resize.
API Docs: https://api.highcharts.com/gantt/yAxis.staticScale
Implementation
double? staticScale;