Hi Paul,
you have to use the \setupletterlayer command to change the entries in
the reference line.
\usemodule[letter]
\setupletter
[name={Joe User}]
\setupletterlayer
[reference]
[list={name,date}]
\startletter
...
\stopletter
If you don’t get a title for your entry you can add it
Dear ConTeXt folks,
I am trying to customize the reference line in a letter.
```
$ context --version
mtx-context | ConTeXt Process Management 1.01
mtx-context |
mtx-context | main context file:
/usr/share/texmf/tex/context/base/mkiv/context.mkiv
mtx-context | current
