# Task Operations

## Content

GanttSheet enables you to perform different operations to illustrate project schedules as listed in the table below.

| **Task Operation** | **Description** |
| -------------- | ----------- |
| Add | Add/insert a task to the GanttSheet.<br>A task cannot be added/inserted before the root task. |
| Remove | Delete a task from the GanttSheet.<br>Note that the root task cannot be deleted. |
| Indent | Increase the level of the task in the GanttSheet. |
| Outdent | Decrease the level of the task in the GhanttSheet. |

To know more, refer to [https://developer.mescius.com/spreadjs/demos/features/ganttsheet/tasks/purejs](https://developer.mescius.com/spreadjs/demos/features/ganttsheet/tasks/purejs)