Thanks for responding. Looked at the documentation you've suggested, and thought I followed the instructions. I pasted both the .tex files I used, is anything else missing? I added another file preamble.tex and edited into index.Rmd YAML. Still not able to generate the Index?
The indentation got messed up when pasted it here, but it looks like this.
output:
bookdown::pdf_book:
toc: yes
includes:
in_header: preamble.tex
after_body: after_body.tex
keep_tex: yes
Is setting the template a requirement? I saw other example where it was set to null. What should it be, if null is NOT ok.
Thanks again,