The TOC provides a sequential list of chapter titles. The index provides an alphabetical list of chapter titles. It seems to me that might be useful for a book that is not intended to be read sequentially end to end.
The reason for multiple entries is that I want to group some similar chapters with slightly different titles under the same index entry as well as having their own entries.
It isn't a big deal if it can't be done. I was curious whether I could do this or not and whether I am just not understanding the tool.
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