Main toolbar > Curve Editor (Open) > Highlight a controller track in the controller window. > Controller menu > Copy
Main toolbar > Curve Editor (Open) > Highlight a controller track in the controller window. > Right-click any blank space
on the Track View toolbar > Show Toolbars > Controllers: Track View > Copy Controller
Copy Controller copies the selected item to the Track View clipboard.
You can use Copy and Paste to copy object and modifier tracks, controllers, objects, and containers, depending on what you are working on.
The Controller tools are also available as buttons on the Controllers: Track View toolbar. This toolbar is hidden by default; to unhide right-click the toolbar and choose Show Toolbars > Controllers: Track View.
Not all tracks can be copied and pasted. The basic restrictions for using Copy and Paste in Track View are: