Command entry: Track View
Highlight a controller track in the Controller window.
Controller menu
Copy
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 components, 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:
The pasted modifier is inserted above the object track you selected. Note that it does not replace any of the tracks in the target object.
To copy and paste a controller:
Make sure you choose the same type of transform that you copied.