Once you have added a Historical Chart to a Workspace, it is possible to adjust the display.
You can adjust both the general chart display settings and the display settings for each data source.
To adjust the general chart display:
Here you can adjust settings such as stacking bars on top of each other or showing time gaps (gaps in the data).
To adjust a data source display:
Here you can adjust settings such as showing values or showing data points for the source.