When you create new pages for a table of contents, you can link to a variety of destinations, in addition to other topics in your project.
Note: Only pages in Microsoft HTML Help projects can link to external topics in other .CHM files. (This kind of link is not supported with WebHelp, JavaHelp, or Oracle Help.)
Click the TOC tab.
Click New
Page .
In Title, enter the name of the page as you want it displayed at the Contents tab in the HTML Help viewer.
Select a destination by doing one of the following: