Add a summary task in the Gantt Chart

Open your plan and click on Delivery / Gantt Chart.

1. Select the Gantt Chart page under the Delivery Plan tab.
2. For adding a Summary Task, select a row above which this new Summary Task will be added, or for adding a Summary Task on top don’t select any row.
3. Click the Add Summary Task (the bluebar-ontop-like icon, on the right of the diamond)
   
4. Enter a Task Name.