Hey @Aurélien,

Currently, the User Composition supports only the breakdown of active users based on a single user property for a max of 365 days in a single aggregate view.

From what I understand of your use case, the closest approach to “monitoring evolution” will be to see how have the event composition changed wrt to that user property over X time period. For this, you can group by the property in an event segmentation chart and then leverage “% of total shown” the view for the stacked bar chart. Like this.

Now you can compare the above event seg chart to a user composition chart for the same user property like this one and see what trends you can find. For this demo data, you won’t find much difference since both the charts show a 50-50 spread between the property values.

Let me know if I have interpreted your use case correctly. Hope this helps.