Dear Pander,
as you guessed making a minimal example and further reading fontspec manual
helped, though without the hints from this list I would not have found out
which problem to fight in the first place. It turns out one of the things I
tested (AutoFakeBold) was what was needed. I just did not see the
difference between normal and bold text because with the default setting
this difference is rather weak with this font. I had to use much bigger
value.
So, with this list's kind help, I finally got what I needed.
Thanks a lot to all of you,
Susan
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