Help Authoring Suite includes three build-in templates for creating Modern CHM Help/Unicode CHM Help file: 

    Default template:  See screenshot and quick reference

    OfficeStyle template:  See screenshot and quick reference

    Simple template:  See screenshot and quick reference

Each template has 8 themes.

    Template:  The template for creating the Classic CHM help file

    Theme:  The theme for creating the Classic CHM help document