Baseline drag not supported?


I want to modify the baseline by dragging.

Is there a settings?

The baselines are displayed by using the additional layer feature:
There, you can return any HTML elements.
Gantt doesn’t add any functionality into those elements so that you can define any custom logic. As a result, you need to implement a custom solution to drag the baselines.

Here is an example of how the baseline drag might be implemented by using Gantt API and Javascript:
It is not an ideal solution, and I didn’t test it in all possible scenarios.