Sub-tasks are a great way to involve colleagues when you need help-or to delegate part of the work-on a task assigned to you.
To create a sub-task:
Open a task.
On the Task Tree tab, select the task assigned to you.
This will activate the Create sub-task button on the left side of your screen.
3. Select Create sub-task and fill in the information in the Create sub-task dialog box.
5. When done, select Save task.
Note: You can create sub-tasks only for tasks assigned to you.
Next: How to re-assign a task?