I should like to set the PDf properties so that the Document Info panel has

Editor ...

Title ...

Subtitle ...

Subject ...

Keyword ....

The problem is that currently

\setupinteraction[subtitle=text,] goes to Subject and that there are no keys to get output labelled Subject or Editor.

I have experimented with \pdfbackendsetinfo{ key }{ Text } but, so far, unsuccessfully.

If this is possible,any suggestions about how to do it will be most welcome.

Alan