Gantt diagram

[ifomin]

Hi, i already downloaded a gantt diagram file
What do I need to do to insert a header (new list of tasks)? How to add a new row i know. The new title allows you to open a group of tasks, and thus there are + and - in the right part of the window, which allows you to collapse the list of tasks. Circled in yellow in the screenshot.

diagram.PNG

[TMS]

You probably need to look into Outlining/Grouping Data. See: https://support.microsoft.com/en-us/...eat%20step%203.