This applies only on CHM help. See Downloading GN4 help and Installing GN4 help on your hard disk.
After you have found a topic, either by searching or by selecting a keyword, the topic is displayed in the right pane of the help viewer, but the table of contents is not necessarily synced.
To locate a found topic in the Table of Contents
To locate that topic in the table of contents, click the Locate button in the toolbar.