Planning an Issue

Click on the white space within the task area, then choose an assignee, hours, start date, and end date.

Click on the 'Plus' button to assign the task to more members.

Then, click 'Plan'.

Create sibling issue in the Gantt Chart

You can click on the right side of an issue to create either a sibling or a child issue.

In order to drag & drop tickets on Gantt, users need to turn off all Quick filters and turn on view setting Show completed tickets

At this point, you can drag tickets on Gantt