A Quick Question about Compiling for PDF


I have compiled my WIP for PDF many times without issue, but I can’t figure out how to fix it so the TAB (in my web browser) shows the correct name for the file / book / whatever-- it always picks a random chapter in the book and uses that for the TAB TITLE.

Is there something I can do to fix this? My preference would be for the ‘Short Title’ / abbreviation name I have for the book.