Gantt - Summary bar

Hello,

When using Gantt, we have a line that visually displays the data one level below.
Currently, everything is superimposed, making the data unreadable (see screenshot)
We would like to replace this with a summary bar.

Any ideas on how to achieve this?

Hello Renaud,
It seems you have the rollup feature, so the child task bars are displayed over the parent task bar. That feature doesn’t modify the height of the parent task and doesn’t cover the case when the task bars overlap.

If you want to display something like a summary bar, you need to implement a custom solution by using the Gantt API and Javascript.
Here is an example that can help you to start:
https://snippet.dhtmlx.com/tq6p2hbm?text=gantt.%2Baddtasklayer