By default, the Task List appears in the To-Do Bar. This list displays all of your tasks and flagged Outlook items.
To turn on or off the Task List, do the following:
On the View tab, in the Layout group, click To-Do Bar.
Click Task List.
To view more tasks in the Task List, turn off or reduce the size of the other To-Do Bar parts. To directly change the number of tasks shown, do the following:
Point to the bar between the Appointments section and Task List. When the pointer changes, drag up or down to increase or reduce the size of the Appointments section.
When you release the mouse button, the number of appointments increases or decreases to fill the available space.