To create a new contents file
On the File menu, click New, and then click Table of Contents.
Click Insert a Heading or Insert a Page to add the titles and subtitles that you want to appear in the table of contents.
Adds a heading level icon to a table of contents with its associated name, file, URL, and style information. 
Adds a page level icon to a table of contents with its associated name, file, URL, and style information.
Notes
You can move an entry up or down, left or right, by clicking the Move Arrows. When you move a heading entry, all the entries that follow it are moved too.
Moves the selection up, down, left, or right. To change an entry, click Edit Selection.
Edits the associated name, file, URL, keyword or style information for the selection. Before you can display a contents file in the Help Viewer, you need to add it to the help project file, and then compile the project.