Main toolbar > Curve Editor (Open) > Right-click the starting area of a toolbar (containing two vertical bars). > Show Toolbars > Controllers : Animation Editor

This toolbar contains the basic tools you need to work with controllers in Track View. This toolbar is hidden as a default. Right-click the Track View toolbar and choose Show Toolbars > Controllers: Track View to display these tools.

All of these commands are always available via the Track View Controller menu.

Filters—Click to display the Filters dialog, which you can use to control what Track View displays in the Controller and Key windows.

Copy Controller—Use this to copy a controller and its animated tracks from a selected object.

Paste Controller—Pasts the copied or cut controller onto a new object or selection of object tracks.

Assign Controller—Use this to assign a new controller to an object. All objects have a default controller assigned; use this to change the default controller to a different one. Select the controller track in the Controller window, then use Assign Controller to select a new one.

Delete Controller— Delete a controller from an object. The controller will be replaced with a default controller.

Make Controller Unique—Changes an instanced controller to a unique controller. This lets you make changes to the controller without affecting any other object tracks.