To Change Task Assignment Duration:
From Gantt Tab
Extend or Reduce the Duration
- Hover over the end of the blue task assignment bar.
- Drag it to the desired date to set a new task end date.
Edit Start and End Dates Manually
- Click on the assignment (blue) bar.
- In the pop-up, edit the Start and End dates.
- Save the changes.
From the Board Tab,
- Click on the task assignment tile
- Edit the Start and End dates and Save it