Flexible to edit Plot Area
Providing full flexibility to edit plot area size to render the chart with the desired space. Have attached the Video in the below thread
To edit plot area size you could use margin and spacing options of a chart.
There is no GUI for those changes or drag and drop on the plot area.
The closest thing is Axis resizer: https://www.highcharts.com/docs/advanced-chart-features/axis-resizer
Demo for vertical resizing (using API options): https://jsfiddle.net/BlackLabel/q1z4voxb/10/
I've pasted the wrong link. Check the below link
Have contacted your support channel first, they have asked me to raise that in uservoice here.