Enhanced decompilation - enables enhanced decompilation.
Folder icons instead of book icons - if this checkbox is selected, the icons in the compiled CHM will look like folders. If it is not selected, the icon will look like books.
Create the list of contents - creates the list of contents or not.
Full-text search - if this checkbox is selected, the compiled CHM file will have a Search tab. It is used for searching the entire book for a phrase or a word.
Note: before a book is compiled into CHM, it is first exported to a set of HTML pages. That is why HTML parameters influence the compiled file.