The "Icons" sheet lets you associate icons with particular categories. There are 4 bindings: You can see the available built-in icons in the API informationbelow. See more

By default the "Data" sheet looks like: The default bindings are: This results in 5 bars, one for each energy source. Each bar is sized according to the Consumption column. Th… See more

Set the "Main category" binding. A bar will be created for each unique category in the chosen column. You can set the icon of each bar by using the "Icon id" bindings in the "Data" … See more

You can create a single block of "stacked" icons by setting the "Sub category" binding (and leaving the "Main category" empty). You'll also need to set the "Icon id" binding and/or the "… See more