On 17 Aug 2016, at 02:19 ,  Pablo Rodriguez <oinos@gmx.es> wrote
> 
> 
> Hi Robert,
> 
> from what I get from your message, there is only one blockquote in the
> introduction.
> 
> How about adding the following code before \starttext?
> 
>    \startsectionblockenvironment[frontpart]
>        \setupinterlinespace[small] % or whichever value you want
>    \stopsectionblockenvironment
> 
> I think it might work. I hope it helps,
> 
> Pablo


Hi Pablo, 

Thanks for your suggestion. I did try to insert this code where I thought I might help, though must admit that I'm not sure what to do with the argument [frontpart].
In my projectfiles, admittedly rather a mess, there is nothing with the name frontpart. Anyway, with or without this or some other possibly more appropriate argument, nothing changed the behaviour of this, or rather a blockquote in this first chapter, not even surrounding the blockquote itself with \setupinterlinespace[small] ...  \setupinterlinespace[reset], as I wrote in my original post. 

But, while I was writing this reply it occurred to me that maybe there might be some local variant for \setupinterlinespace[small]  and, yes, I found \setuplocalinterlinespace[line=4ex] on the ConTeXt wiki and this does the trick. (with [line-3ex]).

So you did help me, though maybe not in the way you intended ;-)

Thanks again,

Best regards,

Robert