My attempts to test this yield errors looking like this:

```
$ pandoc --defaults `pwd`/defaults --latex-engine=lualatex 
--template=my_client.latex my_source_file.pdc -o my_result_file.pdf
pandoc: unrecognized option `--defaults'
Try pandoc --help for more information.
```
looking at the --help output yields this:

```
$ pandoc --help | grep default
  -D FORMAT             --print-default-template=FORMAT                 
                        --print-default-data-file=FILE                  
                        --default-image-extension=extension
```

but no `--defaults` switch.  What am I missing here, please?

-- Hugh 

On Monday, August 16, 2021 at 4:32:15 AM UTC-4 BPJ wrote:

>
>
> Den mån 16 aug. 2021 10:25BPJ <b...-J3H7GcXPSITLoDKTGw+V6w@public.gmane.org> skrev:
>
>> You use the `mainfont`, `sansfont`, `monofont`, `mathfont`, `CJKmainfont`
>> variables for the font names and the corresponding `mainfontoptions` etc.
>> variables. The latter are lists of strings with raw fontspec[^1] options 
>> in the format `'Option=Value'` or `'Option={Multi-word value}'`. The
>> easiest way is to specify them is in a defaults file[^2] like this:
>>
>>     from: markdown
>>     to: latex
>>     pdf-engine: xelatex
>>     variables:
>>       mainfont: Noto Serif
>>       sansfont: Noto Sans
>>       monofont: Noto Mono
>>       monofontoptions:
>>         - 'Scale=MatchLowercase'
>>
>> For some reason the default latex template[^3] does not contain any
>> variable for `defaultfontfeatures` but
>> `\defaultfontfeatures{Scale=MatchLowercase}` is hard coded. In my custom
>> template I have added that variable[^4]:
>>
>>     $if(defaultfontfeatures)$
>>       
>> \mainfontfeatures{$for(mainfontfeatures)$$mainfontfeatures$$sep$,$endfor$}
>>     $else$
>>
>       \defaultfontfeatures{Scale=MatchLowercase}
>>     $endif$
>>
>
> Sorry, a typo: it should be `defaultfontfeatures` rather than 
> `mainfontfeatures`. That's what happens when you copy the wrong line and 
> use search/replace to make up for it! :-/
>
>
>> Font embedding depends on your XeTeX/LuaTeX settings. Usually it Just 
>> Works.
>>
>>
>> [^1]: https://ctan.org/pkg/fontspec
>>
>> [^2]: https://pandoc.org/MANUAL.html#default-files
>>
>> [^3]: https://pandoc.org/MANUAL.html#templates
>>
>> [^4]: https://git.io/J0UJS
>>
>>
>> Den mån 16 aug. 2021 06:56Hugh Esco <hre...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> skrev:
>>
>>> My tests seem to indicate that the fonts which are available to me are a 
>>> function of the value of the `--latex-engine=` switch.  
>>>
>>> If I set that switch to pdflatex (which seems to be the default), I can 
>>> choose any font installed as a .sty file at this path: 
>>> `/usr/share/texlive/texmf-dist/tex/latex/psnfss/`, by setting a value to 
>>> the fontenc key at the top of my markdown source file.  
>>>
>>> But I have not been able to sort out how to access other fonts installed 
>>> at `/usr/share`, by setting the `--latex-engine` to `lualatext` or 
>>> `xelatex`.  
>>>
>>> All my tests seem to look alike, and changing my fonts has no impact on 
>>> how the resulting pdf looks.  
>>>
>>> Can someone please point me to some documentation which would help me 
>>> understand how to use the full range of fonts available on this system, 
>>> suitable for which ever value I set to the `--latext-engine` switch?  
>>>
>>> Thanks,
>>> -- Hugh Esco 
>>>
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>>> .
>>>
>>

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