Thanks to both respondents, you've been a great help - now I know how to
interpret one more item in the LO options properly. Regarding the specific
problematic font (Garamond, yes, it's replaced by TNR by default in both my
machine and my correspondent's printer to whom we submit PDFs), there are
edo1 wrote
> The LO replacement table Tools > Options > LibreOffice > Fonts doesn't
> help, as it can't replace fonts one doesn't have.
This is /exactly/ the purpose of this replacement table i.e., it lets you
take control of which font you would like to see substituted for Garamond
(the missing f