It's advisable to use \quote{...} or \quotation{...} for quotation

marks. That way, if you do need to change them, you only do it in one
place rather than throughout the document.

It looks like \quotation does what I want, but \quote puts the opening quote low and the wrong way around. How can I change this? I find:
    http://wiki.contextgarden.net/Reference/en/setupquote
not very helpful.

\setuplanguage

  [<language>]

  [leftquote=...,

   rightquote=...,

   leftquotation=...,

   rightquotation=...]