# Working with Tasks in Virto Gantt Chart Web Part

Source: [https://docs.virtosoftware.com/docs/virto-gantt-chart-web-part/using-virto-gantt-chart-web-part/working-with-tasks-in-virto-gantt-chart-web-part/](https://docs.virtosoftware.com/docs/virto-gantt-chart-web-part/using-virto-gantt-chart-web-part/working-with-tasks-in-virto-gantt-chart-web-part/)
Product: Virto Gantt Chart Web Part
Updated: 2026-08-12

Virto Gantt Chart web part allows you to add, delete, move and resize tasks right on the chart.

The structure of tasks is shown on the right. Click an arrow next to a parent task to see the child tasks related to it.

![Task structure in the Virto Gantt Chart with an arrow to expand child tasks under a parent](https://img-docs.virtosoftware.com/wp-content/uploads/2024/10/working_with_tasks_in_virto_gantt_chart_web_part_1.png)

If a task contains any attachments, the attachment icon appears.

![Attachment icon shown next to a task that contains attachments in the Virto Gantt Chart](https://img-docs.virtosoftware.com/wp-content/uploads/2024/10/working_with_tasks_in_virto_gantt_chart_web_part_2.png)

Double click the task title to see the details and open attachments or add/remove them.

![Task details panel opened by double-clicking a task title to view and manage attachments](https://img-docs.virtosoftware.com/wp-content/uploads/2024/10/working_with_tasks_in_virto_gantt_chart_web_part_3.jpg)

## Pages
- [Add a Child Task](https://docs.virtosoftware.com/docs/virto-gantt-chart-web-part/using-virto-gantt-chart-web-part/working-with-tasks-in-virto-gantt-chart-web-part/add-a-child-task/index.md) — Give a task children when a task list is the data source; a parent with children becomes a summary task.
- [Add a Milestone](https://docs.virtosoftware.com/docs/virto-gantt-chart-web-part/using-virto-gantt-chart-web-part/working-with-tasks-in-virto-gantt-chart-web-part/add-a-milestone/index.md) — A task whose start equals its end is drawn as a milestone, a marker of zero duration on the timeline.
- [Creating a Task](https://docs.virtosoftware.com/docs/virto-gantt-chart-web-part/using-virto-gantt-chart-web-part/working-with-tasks-in-virto-gantt-chart-web-part/creating-a-task/index.md) — The +Task button creates a task in the web part and the same item appears in the source list.
- [Editing and Deleting a Task](https://docs.virtosoftware.com/docs/virto-gantt-chart-web-part/using-virto-gantt-chart-web-part/working-with-tasks-in-virto-gantt-chart-web-part/editing-and-deleting-a-task/index.md) — Double-click a task to edit or delete it; a read-only data source opens the same form for viewing only.
- [Filtering Tasks by Dates](https://docs.virtosoftware.com/docs/virto-gantt-chart-web-part/using-virto-gantt-chart-web-part/working-with-tasks-in-virto-gantt-chart-web-part/filtering-tasks-by-dates/index.md) — Filter the chart by start or end date using the operators in the date fields of the task list.
- [Moving Tasks and Changing Task Duration](https://docs.virtosoftware.com/docs/virto-gantt-chart-web-part/using-virto-gantt-chart-web-part/working-with-tasks-in-virto-gantt-chart-web-part/moving-tasks-and-changing-task-duration/index.md) — Drag a task to shift its dates, or drag its edge to make the task longer or shorter on the timeline.
- [Percent Complete](https://docs.virtosoftware.com/docs/virto-gantt-chart-web-part/using-virto-gantt-chart-web-part/working-with-tasks-in-virto-gantt-chart-web-part/percent-complete/index.md) — Percent complete is a coloured fill inside the task bar and is changed in the task edit form.
- [Predecessor and Successor tasks](https://docs.virtosoftware.com/docs/virto-gantt-chart-web-part/using-virto-gantt-chart-web-part/working-with-tasks-in-virto-gantt-chart-web-part/predecessor-and-successor-tasks/index.md) — Link tasks so a successor starts after its predecessor; the relation is drawn as an arrow between bars.
- [Resources](https://docs.virtosoftware.com/docs/virto-gantt-chart-web-part/using-virto-gantt-chart-web-part/working-with-tasks-in-virto-gantt-chart-web-part/resources/index.md) — Assigned users appear beside their task when that column is in the data source view, and are taken from the list.