Re: [NTG-context] help with facing page image

7 Mar 2022

      I can see how that works, Sreeram, especially the chapter:after to cope 
with the chapters ending on an even page. Though I will have to try it 
now on a copy of the real document to test it there.

All ten images are different, though, in my case (Chapter1.jpg, 
Chapter2.jpg... Chapter10.jpg all in a pics directory, so I'd point 
\setupexternalfigures to that). I wonder if there is a way to list them 
so that they get called in order as chapters proceed. A kind of "if such 
and such then \setlayer 1,2,3...."

Julian

On 7/3/22 16:38, śrīrāma wrote:
...
On Monday, March 7, 2022 9:19 AM jbf via ntg-context wrote:
...
Author wants an image on facing page to each of 10 chapters in the
bodypart of the document. Assume that everything else is working
properly for this document (double-sided etc.), but other than before
chapter 1, I can't seem to get my facing page image to appear where it
should!
 From what I understood from your explanation, I have this:
%%% SOF
   % for 'mill'
   \setupexternalfigures[location={default}]
\setuppagenumbering[alternative=doublesided]
\definelayer[mill][x=0mm,y=0mm,width=\paperwidth,height=\paperheight,repeat=yes]
   \setlayer[mill]{\externalfigure[mill][width=\paperwidth]}
\startsetups chapter:before
   \doifoddpageelse{}
     {\pushbackground[page]
     \setupbackgrounds[page][background=mill]
     \page[empty]
     \popbackground}
   \stopsetups
\startsetups chapter:after
   \doifoddpageelse{}
     {\page[empty]}
   \stopsetups
\setuphead
     [chapter]
     [page=yes,
     before=\directsetup{chapter:before},
     aftersection=\directsetup{chapter:after}]
\starttext
   \dorecurse{10}{
     \startchapter[title={Chapter \convertnumber{word}{\recurselevel}}]
       \input knuth
       \blank
       \input tufte
       \blank
       \input ward
       \blank
       \ifnum\recurselevel=5
         \page
         \input zapf
         \input zapf
       \fi
     \stopchapter
   }
   \stoptext
%%% EOF
[I am just using the mill picture on every facing page of chapter]
If the chapter ends on an even page then we can insert an empty page with \page[empty] with [aftersection=...] in \setuphead. The [before=...] is push, set background to mill on a new (empty) left page and then pop back (much like the example from wiki).
Sreeram