Sometimes it is useful to break down project tasks representing large amounts of effort into several smaller, more manageable tasks, called sub tasks. This kind of approach is known as task outlining. OfficeTalk lets you do this in the following way:
Add a parent project task by clicking the left mouse button at the bottom of the Project Task window, entering a description and pressing Enter.
Add one or more tasks in just the same way. These tasks will become sub tasks of the parent.
Select these tasks and drag them on to the parent task. The sub tasks will be indented underneath the parent task. A button will appear to the left of the parent task. Pressing the button will hide the sub tasks. Pressing it again will show the sub tasks.
Note: OfficeTalk lets you open a task. This filters the task list window to show only the task's sub tasks. Opening a task is a good way of adding sub tasks since any tasks that you add when the list is filtered in this way will automatically become sub tasks of the opened task. To open a task, click the right mouse button on the task and select Open… from the context sensitive menu.