Search within a sub-tree
You can limit your search to topics within a specific sub-tree of a map.
The criteria you can use may include topic Title, Author, or ID, although the exact set of criteria that appears may vary according to your configuration.
Unlike Advanced Search, you won't need to enter topic IDs or author
                names to search for them. Instead, the Search within a sub-tree procedure offers you
                lists of information extracted from the current map.
        Note: The map must be
                    open in either the DITA Map view or the DITA Map Editor.