Use folder (Contents Entries) to structure your documentation. Folders are categories to group your topics. In addition, folders are added as category to automatically created Navigation pages and sections. For example, add foldersfor each category to sort a class by your own categories. You can use these categories in addition to standard categories when you generate navigational information for your project.
To create a contents entry
On the Manage tab, in the Create Content group, click New Topic .
In Topic ID, enter a topic ID for your contents entry.