Determines what entries Author-it will include in the index. You can choose one or more options:
- Index Entries will include entries defined in the Index Contents pane.
- Topic Heading will include an entry for each Print tab topic heading in the book.
- Cross References will include an entry for the referenced topic, at the point from where it is referenced.
The PrintFromHeadings element corresponds to the "(Build index from) Topic headings" field on the Document tab of the Index object.
true, false, (don't inherit)