To add a track to a character, group, or subcharacter
A black line appears above or below the selected clip’s track. This line indicates that Maya will insert a single track above or below the selected clip’s track when you release the mouse button.
-click a track, and select one of the following options from the menu that appears: Insert Track Above or Insert Track Below.
These options insert a track above or below the selected clip’s track. See Context-sensitive menu.
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