# Child Task

Source: [https://docs.virtosoftware.com/docs/virto-gantt-chart/using-virto-gantt-chart-app/actions-with-tasks-in-virto-gantt-chart-app/child-task/](https://docs.virtosoftware.com/docs/virto-gantt-chart/using-virto-gantt-chart-app/actions-with-tasks-in-virto-gantt-chart-app/child-task/)
Product: Virto Gantt Chart App
Updated: 2026-08-12


Sometimes you need to define parent-child relations between tasks on the Gantt chart. If a **Task list**is chosen as a data source, you can add child tasks. If a task has at least one child task, it is displayed as a summary task.

![Parent task displayed as a summary task with nested child tasks in the Virto Gantt Chart App](https://img-docs.virtosoftware.com/wp-content/uploads/2024/11/child_task_1.jpg)

On the left part summary task appear with an arrow and ability to collapse the child tasks.

![Summary task with a collapse arrow in the left pane of the Virto Gantt Chart App](https://img-docs.virtosoftware.com/wp-content/uploads/2024/11/child_task_2.jpg)

To add a child task, click the summary task in the left part of the app and use “+ Child task” button. In this case SharePoint list data source must be also a task list.

![Plus Child task button on a selected summary task in the Virto Gantt Chart App](https://img-docs.virtosoftware.com/wp-content/uploads/2024/11/child_task_3.jpg)

Fill in the fields to add the child task.

![New child task form with fields to fill in within the Virto Gantt Chart App](https://img-docs.virtosoftware.com/wp-content/uploads/2024/11/child_task_4.jpg)

You also can change the position of summary tasks by using “Indent” and “Outdent” button. This way you can create complex strutures of tasks with multiple levels.

![Indent and Outdent buttons used to build multi-level task structures in the Virto Gantt Chart App](https://img-docs.virtosoftware.com/wp-content/uploads/2024/11/child_task_5.jpg)