On Fri, 4 Sep 2020, jbf wrote:

> Thanks Otared. That clears up that little item :-)
> 
> BTW I know how to reduce font size in the headers (chapter titles) that 
> appear on the recto pages, which I can do with something like 
> \setupheader [style={\ss\switchtobodyfont[10pt]}], but it doesn't seem 

Better to use style={\switchtobodyfont[10pt,ss]} or \switchtobodyfont[10pt]\ss...

> to affect the header (title of the book) on the verso pages, which is 
> drawn from the simple statement:
> 
> \startdocument
>    [metadata:title={Book title}]
> 
> Shouldn't  \setupheader affect both headers? Or is it possible I have 
> left something out of my \setupheader declaration?

A minimal example will make the debugging process much easier.

Aditya