Dragging and Dropping Topic or Map Elements Into a Map

You can drag and drop topic or map elements from the repository into a map.

This is the most efficient method for adding an existing topic or map to the map you are editing.
Drag an existing DITA topic or map from any Workbench view and drop it in the Document Structure area in the desired location in the map hierarchy.
Drop Location Description
Onto a map element The topic or map is added as a child of the element. If the element already has child elements, the topic or map is added as the last child of the element.
Between existing map elements The topic or map is inserted into the hierarchy between the map elements. As you are dragging the element, a horizontal line indicates the location and hierarchy level where the topic will be inserted.