> Pablo Rodriguez <mailto:oinos@gmx.es>
> 6. Juli 2018 um 11:14
> Dear list,
>
> [...]
>
> Locations for leftedge, rightedge and text don’t seem to work (in
> Acrobat Reader, SumatraPDF and Evince).

By default the leftedge and rightedge areas are disabled because they 
have a width of 0pt and
even when you enable them you won’t see them because they are outside of 
the visible area.

%%%%%%
\setuppapersize[A5][A4]

\setuplayout[location=middle]

% \setuplayout[leftedge=2cm,rightedge=2cm]

\showframe

\starttext
\page[empty]
\stoptext
%%%%%%

Wolfgang