<texcode>
\starttext
\setuppapersize[A5][A5]
\setuppagenumbering[alternative=doublesided]
\starttext
\startpagemakeup[align=center,doublesided=no,%
\stoptext
</texcode>
Reference: http://www.ntg.nl/pipermail/ntg-context/2011/063030.html
Or, another solution (which can be tuned at will), which relies on a
new feature in MkIV: there is also a layout with the same name as the
makeup environment and you can control the margins of your new title
page environment with \setuplayout[makeupname][...].
<texcode>
\setuppagenumbering[alternative=doublesided]
%\showframe
\setuppapersize[A5][A4,landscape]
\setuparranging[2UP]
\definemakeup[titlepage][pagestate=start,doublesided=no]
\setuplayout[titlepage]
[backspace=2cm,width=108mm] % 148mm is the width, 20 mm of backspace,
% 20 mm of outer margin
\starttext
\starttitlepagemakeup
\raggedcenter
\bfc This should be the long, long, very long title\par
\stoptitlepagemakeup
This is the colofon
\chapter{Start here on page 3}
\dorecurse{20}{\input tufte\par}
\stoptext
</texcode>
Reference== Scaled Full Page Image 1 == An elegant option is to extend the makeup mechanism to accept the background key: http://www \unprotect \appendtoks \setupbackgrounds[\v!page][\c!background=\makeupparameter\c!background] \to \t_page_makeup_every_setup \protect Then you can use <pre> \setupexternalfigures[location={local,default,global}] \defineoverlay [backgroundimage] [{\externalfigure[cow.ntg.nlpdf][width=\overlaywidth, height=\overlayheight]}] \starttext \startstandardmakeup[background=backgroundimage] Whatever \stopstandardmakeup Next \stoptext</pipermail/ntgpre> == Scaled Full Page Image 2 == Another way to use a full-context/2011/063030.htmlpage image includes:
<pre>
\startTEXpage
\externalfigure[cow.pdf][width=\paperwidth, height=\paperheight]
\stopTEXpage
</pre>