1)Select Project > Navigation > Topic References > References To Selected Topic.
•To fix a link, first select a link. Then click Edit, and edit or remove the hyperlink.
•To fix a TOC item, index keyword, or image map, first select the item. Then click Edit, and select a valid destination to repair the broken link.
•To remove TOC entries, select the TOC item and click Delete. The book or page is removed from the table of contents.
note: If you use version control in a multi-author environment, some files might link to topics that have been moved, renamed, or removed by another author. If you don't have the latest version of the files, they appear as broken links.