Add a Child Activity (Spreadsheet View)
When you add a child in a spreadsheet view, Open Plan automatically converts the parent activity into an internal subproject.
To add a child activity:
In the Project Views folder of Open Plan Explorer, select a project to display in spreadsheet view.
Create an activity with an ID that indicates the desired parent/child relationship.
For example, to add a child to activity ACT01, create activities ACT01.01, ACT01.02, and so on.
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