Thanks for the prompt response. Something not too obtrusive would be ideal - though of course I could always just introduce the correct opening quotation mark by search and replace. It's odd that trep = yes works for closing quotation marks in this font, and that the equivalent in XeTeX works as expected for both opening and closing marks. 

Best wishes

John  🇪🇺  


On Sun, 15 Jun 2025, 16:29 Henning Hraban Ramm, <texml@fiee.net> wrote:
Am 15.06.25 um 17:20 schrieb John Was:
> Hello
>
> I have found that trep=yes gives me correct closing quotation marks in
> the commercial font Baskerville MT Pro if I type the simple ' as usual
> in TeX; but opening quotation marks remain as ` or ``.

Don’t do this. Use \quote{} for single quotes and \quotation{} for
double quotes.
Maybe use \setuplanguage to change the quotation marks.

Hraban
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