When you create a new topic in your project's Project Files section you just create a topic file, without an entry in the Table of Contents (TOC). Topics like these are used in electronic help formats for information that is only displayed when the user clicks on a link – for example popup topics and topics displayed in external windows.
Topics without TOC entries are also used for content that you want to insert in multiple locations in your project with Help+Manual's snippets function.
The instructions below explain how to create topics without TOC entries. See Creating new topics in the TOC for instructions on creating topics with TOC entries.
If you save in single-file compressed mode (.hmxz) all your topic files are stored inside your compressed project file and can only be viewed in the Project Explorer. The Basic version of Help+Manual can only save in compressed mode.
Insert New Topic (Reference)