You can design your compiled help (.chm) file so that the Navigation pane is automatically hidden when a user clicks outside of the HTML Help Viewer. This allows the user to see more of the screen when working in a software program. When the user clicks inside the help topic, the Navigation pane is reopened.
To see an example of a help file that automatically hides the Navigation pane, you can download and view the help topics for the Help Viewer from the HTML Help Web site.
About customizing the Help Viewer | |