Is it possible to have multiple legends for a serie?
Unfortunately no, that is not possible.
For example, I have a histogram with a series, and there are different color bar on it.
It is not possible to display that want to "say" each color?
Because it is a bit annoying.
You never encounter this problem?
You have no idea?
The chart only implements such legends in the Pie chart, where every value is shown in the legend but it is unfortunately and currently not possible to have the same behavior for other chartypes, there the chart legends only display the amount of series.