The Timeline Editor window supports the following different methods of duplicating tracks:
Select a track. Right-click in an empty area in the Track list and select Duplicate from the context menu.
Select a track. Hold Command/Control and press D.
Select a track. Hold Command/Control and press C. for copy, and press V for paste.
Right-click a track and either select Duplicate from the context menu or hold Command/Control and press D.
Duplicating a track copies its clips, blends, and Inspector properties. If the duplicated track is bound to a GameObject, the binding is reset to None.
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