Filters lets you determine which categories of items appear in Track View. When you click the Filters button, Track View opens the Filters dialog.
You can also right-click the Filters button for quick selection of items.
To position a selected object at the top of the Track View Hierarchy:
Track View opens with the selected object at the top of the Track View Hierarchy.
To display the animated transform tracks for an object in Track View:
You use the Filters dialog to choose what to display in Track View. For example, you can limit the view to animated tracks only, or tracks for selected objects. This dialog also controls function curve display and transform display for Position, Rotation, Scale, and X, Y, and Z axes individually.