Hi Hung,
We have analyzed your reported query. The legend rendering
is designed to follow a left-to-right direction. While we understand your
requirement for center-aligning the legend items, our current system only align
the entire legend to the center of the chart. At present, we cant move the 2nd
row legend to the center of the chart.
We appreciate your feedback and encourage you to reach out
if you have any further concerns or queries.
Regards
Gopalakrishnan Veeraraghavan