To Attach a Named Group to a Task from Attach Element to Task dialog

In the Animation Producer dialog, click the Attach Element to Task icon.

The Attach Element to Task dialog opens.
From the Task option menu, choose the task to which you want to attach the element and then select the element to attach.
From the Named Group option menu, choose the element to attach.
The element(s) in the named group are listed in the graph and in the tree pane as a subtask of the selected task.

Note: You can also attach a named group to a task by using the key-in ANIMATOR SCHEDULE ATTACHNAMEDGROUP <named group> <taskID>.