I do not quiet understand what the meaning of "stacked" and "overlapped".
What was those light purple part that in between of tow bars in "Overlapped" mode?
For "stacked" mode, if I switch the order of the data, label and the color, I expect to see the form of the histogram also changed. But the histogram actually do not change. This is strange, because it means in one way one data is larger then the other but in the other way it is smaller. The consequence is not in consistence itself. Could any one explain the exact meaning of Stacked and Overlapped mode?