These toolbars appear or are available in both Track View modes: Curve Editor and Dope Sheet. They provide tools for managing various Track View functions, including using track selections, navigation, and controllers.
The Controllers toolbar contains the basic tools for working with controllers in Track View. This toolbar is hidden by default; to display it, right-click the Track View toolbar and choose Show Toolbars Controllers: Track View.
The Key Stats toolbar controls key display. It appears by default on the lower toolbar in the Track View modes Dope Sheet and Curve Editor Classic layouts. In the default Curve Editor layout, it is replaced by the Key Entry toolbar.
The Navigation toolbar has controls for navigating the key window or curve window.
The Tools toolbar has buttons for managing Note tracks, Visibility tracks, controller properties, starting utilities, and some buttons also available from other toolbars.
The Track Selection toolbar has controls for particular object or track selections.