To simplify creating new elements, two kinds of dummy elements exist:
The dummy channel element is available if the element tree is empty. It is used to create a new channel element by simply double-clicking the item. The wizard that opens helps you create a new element.
The dummy device element is available whenever the element has no siblings. It is used to create a new device element by simply double-clicking the item. The wizard dialog that opens helps you create a new element.