Dear ConTeXters, for PDF document one can set /PageLayout. It is a mode in which reader shows us pages (Single, Continous, Facing, ...). in ConTeXt one can set \setupinteractionscreen[option=doublesided] which set layout /TwoColumnRight (understand two facing continuous pages with odd pages on the right side). Since PDF 1.5 there is a possibility to set 3 more layouts: /TwoColumnLeft /TwoPageRight /TwoPageLeft I poropose to incorporate next lines of code to sources to enable setting of these layouts % double=facing, column=continuous, right|left=where odd page \setupinteractionscreen[ option=doublecolumnleft, option=doublepageright, option=doublepageleft, option=doublecolumnright, % for compatibility = doublesided option=doublecolumn, % for simplicity = doublecolumnright option=doublepage, % for simplicity = doublepageright ] These names are derrived from curren naming convention (doublesided) and PDF names. May be we can use more intuitive variants: option=facingright, option=facingleft, option=facingcontinuousright, option=facingcontinuousleft, Sorry I know English and Czech interface only and for FDF driver. May be somebody add more. Vit Proposal: ----------------------------------------------------------------- % mult-con.tex \startvariables dutch english german czech italian romanian french doublecolumnright: doublecolumnright doublecolumnright doublecolumnright dvasloupcevpravo doublecolumnright doublecolumnright doublecolumnright doublecolumnleft: doublecolumnleft doublecolumnleft doublecolumnleft dvasloupcevlevo doublecolumnleft doublecolumnleft doublecolumnleft doublecolumn: doublecolumn doublecolumn doublecolumn dvasloupce doublecolumn doublecolumn doublecolumn doublepageright: doublepageright doublepageright doublepageright dvestrankyvpravo doublepageright doublepageright doublepageright doublepageleft: doublepageleft doublepageleft doublepageleft dvestrankyvlevo doublepageleft doublepageleft doublepageleft doublepage: doublepage doublepage doublepage dvestranky doublepage doublepage doublepage \stopvariables % core-int \setvalue{\??sc\c!option\v!doublecolumnright}{4} % compatibility \setvalue{\??sc\c!option\v!doublecolumnleft}{5} % new \setvalue{\??sc\c!option\v!doublepageright}{6} % new \setvalue{\??sc\c!option\v!doublepageleft}{7} % new \setvalue{\??sc\c!option\v!doublecolumn}{4} % compatibility \setvalue{\??sc\c!option\v!doublepage}{6} % compatibility % spec-fdf.tex \def\doPDFsetupscreen#1#2#3#4#5#6% watch the extra argument {\bgroup \xdef\currentPDFpagemode {\ifnum#6=4 /PageLayout /TwoColumnRight \else\ifnum#6=5 /PageLayout /TwoColumnLeft \else\ifnum#6=6 /PageLayout /TwoPageRight \else\ifnum#6=7 /PageLayout /TwoPageLeft \else /PageMode \ifcase#6 /UseNone\or/FullScreen\or/UseOutlines\else/UseNone\fi \fi\fi\fi\fi}% \xdef\currentPDFviewerprefs % space after #6 needed, else \relax {\ifcase#6 \or\or\else /ViewerPreferences << /FitWindow true >>\fi}% \egroup} ------------------------------------------------------------