This feature is supported in DotNet Help, HTML Help, WebHelp, WebHelp Plus, and WebHelp AIR output.
You can customize your output so that users can always see where the current topic belongs in the table of contents (TOC), even if they did not access the topic via the TOC. This can be done by selecting the "Automatically Synchronize TOC" option in the Skin Editor. When users navigate from topic to topic in the output, the TOC automatically changes accordingly, highlighting the topic that is open.
How to synchronize the TOC with open topics
to save your work.Make sure that you associate the skin with the target.