Thanks Wolfgang and Alan! I will experiment with them tomorrow.
Best Wishes
Keith McKay


On Thu, 16 Mar 2023, 18:07 Alan Braslau, <alan.braslau@icloud.com> wrote:

> On Thu, 16 Mar 2023 18:27:53 +0100
> Wolfgang Schuster via ntg-context <ntg-context@ntg.nl> wrote:
>
> > Keith McKay via ntg-context schrieb am 16.03.2023 um 17:59:
> > >
> > > Hi,
> > >
> > > I would like to position a combination of images where the centre
> > > of the combination coincides with the centre of the text area of a
> > > page. In the example below I have made the combination into a layer
> > > thinking that this would be the easiest way to position it where I
> > > wanted. However to position in the centre of the page I would need
> > > to know the size of the combination and use this to calculate the x
> > > and y values for positioning of the layer. I have looked at the
> > > Wiki page on image size of combinations but still cant figure out
> > > how to do it. Any suggestions on how to go about this or is their a
> > > better way?
> > >
> > > Wiki Page reference:
> > > https://wiki.contextgarden.net/Combinations#Image_Width
> > >
> > > Thanks
> > >
> > > Keith McKay
> > >
> > > %%% example %%%
> > >
> > > \setuppapersize[A4,portrait]%[A4,portrait]
> > >
> > > \setuplayout
> > >
> > > [backspace=2.5cm,
> > >
> > > topspace=1cm,
> > >
> > > height=28cm,
> > >
> > > width=17cm,
> > >
> > > header=0cm,
> > >
> > > footer=0.75cm,
> > >
> > > ]
> > >
> > > \useMPlibrary [dum]
> > >
> > > \starttext
> > >
> > > \definelayer[test3]
> > >
> > > \setlayer[test3][x=2cm,y=15cm]
> > >
> > > {\startcombination[nx=3,ny=1,distance=15mm,after=,location=middle]
> > >
> > > {\externalfigure[dummy]}{}
> > >
> > > \rotate[rotation=90]{\externalfigure[dummy]}{}
> > >
> > > {\externalfigure[dummy][]}{}
> > >
> > > \stopcombination}
> > >
> > > \flushlayer[test3]
> > >
> > > \stoptext
> > >
> >
> > \useMPlibrary [dum]
> >
> > \showframe [text] [text]
> >
> > \setuplayout [tight]
> >
> > \starttext
> >
> > \centerbox
> >     {\bTABLE[frame=off,offset=7.5mm,align={middle,lohi}]
> >          \bTR
> >              \bTD
> >                  \externalfigure[dummy]
> >              \eTD
> >              \bTD
> >                  \rotate[rotation=90]{\externalfigure[dummy]}
> >              \eTD
> >              \bTD
> >                  \externalfigure[dummy]
> >              \eTD
> >          \eTR
> >      \eTABLE}
> >
> > \stoptext
> >
> > Wolfgang
>
> Or you could put the combination in a frame:
>
> \startparagraph [align=middle]
>   \startframed [frame=off,offset=\zeropoint]
>     \startcombination [nx=3,ny=1]
>       {first} {}
>       {second}{}
>       {third} {}
>     \stopcombination
>   \stopframed
> \stopparagraph
>
> Alan
>