About chapter and HTML splitting

Chapter split in Mobi Maker is not so necessary as in ePub Maker, but splitting chatter still can help you to

The same as ePub Maker, you need to insert section breaks in Word so that Mobi Maker can split chapters for you. There're some other things to notice,

Following "chapter" means Mobi chapter, it can be or not be literal chapter of your book.

From A Word Document

Mobi Maker can split Word HTML on section breaks. So inserting section breaks between chapters will make Mobi chapters naturally.

If the split function is disabled(in advanced tab) or there's no section break in the Word document, the document will be converted to one big HTML file, so no chapter information then.

Check up "Auto create chapter title" and select "from first heading" if you have set headings in each chapter, (title should be set as the first heading format in MS Word)

From Multi HTML Files

Mobi chapter can be the same as book chapter or not. It depends on whether you put each chapter in a HTML file.