In Apache Echarts, when using multiple pie charts (e.g. nested pies, or even side-by-side pies), how do we add a title to each pie to signify what the pie represents? While the “title” option can accept an array of titles, there isn’t a good way to position them so that they are above, within or in some other way related to the respective pies they are meant to label. It’s as if there’s a missing concept of a seriesLabel / seriesTitle that sits conceptually between the chart title and the individual item labels.

Series item labels are already in use for the items (pie slices) so cannot be used with position: center, and that wouldn’t help with nested pies anyway since there’s only room for one label at the center.