The Cumulative Flow Charts app is enabled from Apps and Integrations in the drop-down menu of your board.
Once activated an additional button “Cumulative flow charts” will appear in the same menu.
Choosing this displays a chart dashboard showing card distribution over your board columns.
Cumulative flow chart options
Setting a Date range filters out cards that are not contained within the specified time period. It's also possible to have archived cards included by ticking the box "Include archived cards".
Columns can be hidden from the Cumulative flow chart by clicking their names below. The column names will then appear as grayed out and the column contents will no longer be shown in the chart.
