Here is how to duplicate tasks in gantt view in asana
- First click on a project in the left sidebar under Projects section
- Then click on "Gantt" view option in the top navigation bar
- Next click on task block you want to duplicate
- Then click on the "More actions" button (three dots) in the task details panel
- Next click on "Duplicate task" option from the dropdown menu
- Finally click in the Gantt chart area to place the duplicated task
- Finally click on the Create a New Task button to complete duplicating the task
