You can locate a topic or map referenced in a map in the Navigation view using the Workbench Map Editor context menu.
This command works only on topics or maps that exist in the repository when the map was loaded in the editor.
In the Document Structure area, right-click a topicref or mapref that references a topic or map in the repository, then select Locate Target Topic.
The Navigation view expands the hierarchy to the selected topic or map, and highlights it.