The current view is indicated in the task pane by a selected option button (in this case, Simple List, the default view).
Click the Detailed List option button in the task pane to change to this view. In Detailed List view, you see columns for subject, status, due date, percent complete, and any assigned category.
To view a graphical timeline of scheduled tasks, click Task Timeline.
To help you manage your Tasks list, you can change how it is displayed, or its view. Outlook provides several predesigned views. Some options, such as Detailed List, change what appears in the list. Some filter the list to include only a range of entries.
Checking the Header Bar
You can tell when Outlook is displaying only a subset of tasks by looking at the Header bar. You'll see (Filter Applied) when only some of the tasks are displayed.