View Options
Open the View menu and choose View Options to see the various ways you can customize what kind of information is displayed in each of the task, resource, and calendar views.
For example, in task view, you can choose which columns are visible in the task outline and what kind of information to show on the Gantt chart side.
In task view and resource view, you can customize which data to show for objects. Click the pop-up menus beside or inside the task bar, group bar, or milestone to choose which data appears there in the chart.