On Task form, you can add a related item as:
- Child: the added item will be child of the current task, and they are depend on each other in Gantt View.
- Parent: the added item will be parent of the current task, and they are depend on each other in Gantt View. Note: a task can only have 1 parent.
- Related to: the added item will be related to the current task.


- A task can be the child/parent/related to of another task.
- A bug can only be realted to of another task/bug.
Note: eTask only support child/parent for tasks.
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