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<context>\setupbodyfont[rm, 9pt]\startcolumns[n=32,rule=on]
You can add all Normally, columns are automatically balanced with the text distributed over the options number of <cmd>setupcolumns</cmd> to <cmd>startcolumn</cmd>requested columns.You should be able to enforce can provoke a new column with switch using {{cmd|column}}. <cmdcontext source=yes>\setuppapersize[A5] \startcolumns[n=2]\input ward\column\input weisman\stopcolumns</cmdcontext>, but that's broken (at least since 2006).
see Paragraphs are useful in collecting text to be displayed together.For example:<context source="yes">\setuppapersize[A5] \defineparagraphs[TwoThird][n=2] % The width of the second paragraph is automatically calculated if unspecified.\setupparagraphs[TwoThird][1][width=.66\textwidth] \startTwoThird\quotation{...{\it why is there something rather than nothing?}For nothing is simpler and easier than something.Furthermore, assuming that things must exist,one must be able to explain{\it why they must exist thus,}and not otherwise.}\nextTwoThirdG. W. Leibniz, {\it\fr Principes de la nature et de la grâce fondés en raison,} 1714.\stopTwoThird</context> See "Paragraphs in Columns" section in the [[http://pmrb.free.fr/contextref.pdf ConTeXt reference manual] for further details. =(Simple)Columns in a narrow frame=To put multiple columns in a frame, this works:cont-enp <context source="yes">\setuppapersize[A5] \framed[width=0.pdf9\hsize,location=middle]\bgroup \startnarrower[2*middle] \setlocalhsize \hsize\localhsize \startsimplecolumns \input tufte \stopsimplecolumns \stopnarrower\egroup</context> Another possibility is to use [[TextBackground|manualtextbackground]] around the text. <context source="yes">\setuppapersize[A5] \setupcolors[state=start]\definetextbackground [book] [state=start, topoffset=.5ex, location=paragraph, leftoffset=1ex,bottomoffset=1ex] \starttextbackground[book] Tufte again \startcolumns[n=2] \input tufte \stopcolumns\stoptextbackground</context>
see An alternative method of typesetting text into columns uses columnsets.This method offers more possibilities than simple columns,in particular in placing floats such as figures and in creating columnspans.See [[manual:columns.pdf|Columns manual]] or [[source:page-set.texmkiv|column sets source]]for many examples.
If you need more Columnsets are kind of special. They are mostly meant for special products withmagazine like properties. They are normally not mixed with single column layoutsand not all features of ConTeXt might cooperate well with a mechanism likethis. We use the name page grid because (layout grid as with other reimplementations ofMkII featuresin MkIV, spreads, different column widths etcwe need another namespace in order to migrate stepwise.) please read This implementation is not neccessarily better than the manual!previous one but it mightbe easier to extend it. It should be a bit more efficient.
see [[source:m-streams.tex|streams source]] From the [[http://archive.contextgarden.net/message/20060331.175831.414d087b.en.html|announcement mail]] by Thomas Schmitz:
small fixes (something about new/old columns still pending; text about floats doesn’t fit the current state)
< [[Visuals]] | [[Layout]] >
= Overview =
There are different possibilities to typeset text in two or more columns:
* paragraphs : if you need a table-like structure (translations, questionaires etc.)
* column sets : the flexible way for varying columns or other complex tasks
* page grids : new column sets implementation (MkIV)
* streams : set different text synchronized side-by-side (e.g. bilingual editions)
Columns and columnsets are different mechanisms to produce a document
with two or more columns of text.
* The <code>columns</code> mechanism is the older one with limited control about the placement of figures but allows you to mix one column and multicolumns text on a page.
* <code>columnsets</code> is a new version of the column mechanism with more control about the placement of figures and other features like spanned columns etc. (look at the [[Columns#Column_Sets|manual]] for more); it is better than <code>columns</code> for magazine-like layouts.
=Columns=
<texcodecontext source=yes>\setuppapersize[A5]
\startcolumns[n=3]
\input knuth
\stopcolumns
</texcodecontext> You can add all the options of {{cmd|setupcolumns}} to {{cmd|startcolumns}}. For example, simple ruled columns are easy: <context source=yes>\setuppapersize[A5]
\input knuth
\stopcolumns
</context>
Column balancing fails in "lines" mode (e.g. for poetry).
Influencing the color of the separator rule is somewhat tricky:
<context source=yes>
\setuppapersize[A5]
\setupcolors[textcolor=blue]
\color[red] % rule color, but might influence also the color of other elements
\startcolumns[n=3,rule=on]
\input knuth
\stopcolumns
</context>
=Paragraphs=
=Column Sets=
If you don't need much more than the "normal" columns, but e.g. "lines" mode, try this:
<texcodecontext source="yes">\setuppapersize[A5] \definecolumnset[twocolTwoColumns][n=2] \startcolumnset[TwoColumns] \startlines % enforce line breaksStarlight, star bright,first star I see tonight;\stoplines
\startcolumnset[twocol]column
\startlines
I wish I may, I wish I might
have the wish I wish tonight.
\stoplines
\stopcolumnset
</context>
For more details (layout grid features, spreads, different column widths etc.) please refer to the [[manual:columns.pdf|manual]]!
==Vertical lines between columnsets (rules)==
Sometimes it is required to have a vertical line between the columns of your columnset. This code draws MetaPost lines in the right place:
<context source=yes>
\setuppapersize[A5]
\startuseMPgraphic{verticalrule}
if CurrentColumn < NOfColumns :
draw rightboundary OverlayBox shifted (4mm,0);
setbounds currentpicture to OverlayBox enlarged 2.5mm;
fi
\stopuseMPgraphic
\defineoverlay
[verticalrule]
[\useMPgraphic{verticalrule}]
\definecolumnset[TwoColumns][n=2,background=verticalrule]
\starttext
\startcolumnset[TwoColumns]
\startlines % enforce line breaks
Starlight, star bright,
first star I see tonight;
\stoplines
\column % here it works!
\startlines
\stopcolumnset
\stoptext</texcodecontext> =Page Grids= Page grids are a new implementation of columnsets, intended to replace the old mechanism. From the [[source:page-cst.mkiv|source]]:
=Streams=
We have streams for even and odd pages that can be synchronized at certain points.
This is useful for, e.g., typesetting bilingual books: have the original on the even pages, the translation on the odd pages, and synchronize at certain points.
Hans later re-implemented that mechanism in the core. For details see [[source:page-str.mkiv|the source]].
The module provides a rather low-lever interface. Hans suggested some handy shortcuts:
Beware, streams don't work in columns and not very good in columnsets.
==Examples of MkIV streams==
(copied from the source)
<texcode>
\enabletrackers[streams.flushing]
\setuplayout[grid=yes] \showgrid
\starttext
\input tufte
\startoutputstream[nl]
Wat doen we hier?
\enableoutputstream[en]
Are you sleeping, brother John?\footnote{xxx}
\dorecurse{4}{x \footnote{note \recurselevel}\input tufte \par \pushoutputstream}
\enableoutputstream[de]
Bruder Jakob, schläfst du noch?\footnote{yyy}
\dorecurse{4}{x \footnote{note \recurselevel}\input ward \par \pushoutputstream}
\disableoutputstream
\stopoutputstream
Vader Jacob, slaap je nog?\footnote{zzz}
\input tufte
\synchronizestreams[en,de,nl]
\page \flushoutputstream[en] \input knuth
\page \flushoutputstream[de] \input knuth
\page \flushoutputstream[nl] \input knuth
\stoptext
</texcode>
Posting by Wolfgang to the mailing list (2016-11-27):
<texcode>
\starttext
\startoutputstream[one]
\setupalign[flushleft]
\dorecurse{3}{Line \recurselevel\par}\pushoutputstream
\blank
\dorecurse{6}{Line \recurselevel\par}\pushoutputstream
\blank
\dorecurse{4}{Line \recurselevel\par}\pushoutputstream
\stopoutputstream
\startoutputstream[two]
\setupalign[flushright]
\dorecurse{5}{Line \recurselevel\par}\pushoutputstream
\blank
\dorecurse{2}{Line \recurselevel\par}\pushoutputstream
\blank
\dorecurse{7}{Line \recurselevel\par}\pushoutputstream
\stopoutputstream
\synchronizestreams[one,two]
\startoverlay
{\outputstreambox[one]}
{\raise2\strutdp\outputstreambox[two]}
\stopoverlay
\stoptext
</texcode>
(Wolfgang continued:)
The mechanism to create pages/columns for the stream content is
missing.
You can save text and flush it afterwards but there is no command which
places the content side by side (or in columns). Below is a simple example
but I had to write the splitter myself.
<texcode>
\starttext
\startoutputstream[one]
\startcolor[red]
\dorecurse{10}{\input knuth\par}
\stopcolor
\stopoutputstream
\startoutputstream[two]
\startcolor[green]
\dorecurse{10}{\input zapf\par}
\stopcolor
\stopoutputstream
\synchronizestreams[one,two]
\setbox\scratchboxone\outputstreambox[one]
\setbox\scratchboxtwo\outputstreambox[two]
\doloop
{\ifvoid\scratchboxone
\exitloop
\else
\setbox\scratchboxfour\vsplit\scratchboxone to \textheight
\vbox to \vsize{\box\scratchboxfour\vss}%
\setbox\scratchboxfive\vsplit\scratchboxtwo to \textheight
\vbox to \vsize{\box\scratchboxfive\vss}%
\fi}
\stoptext
</texcode>
{{todo|We need documentation and samples for Paragraphs, Streams and Column Sets}}
Columnsets have a limitation, however: they are very strongly grid-based, and you can't change the interlinespace within the columnset (e.g., if some paragraphs are typed in a smaller font). You can change the interlinespace if the entire text with a smaller interlinespace fits in one column, like a float or a section title (putting it between <code>\startlinecorrection\stoplinecorrection</code>), but if the text with a smaller interlinespace starts in one column and has to continue in the following one, nothing will work, and the layout will be completely messed.
Changing the font weight or shape inbetween <cmd>startcolumnset</cmd> and <cmd>stopcolumnset</cmd> may cause some columns to be shifted vertically. Then you must use <cmd>restoreinterlinespace</cmd> after the font switch (<cmd>bf</cmd>, <cmd>ss</cmd>) to correct the interline spacing. See [http://thread.gmane.org/gmane.comp.tex.context/20932].
So, if you want columns and one-column floats and don't have to change the interlinespacing, use Columnsets. If not, you can use Columns with some tricks.
This has some limitations, too. If you put a float at the top of a column and there is another float that spans more than a column over all, the grid will be broken, so you have to put it in another page, but you can put more than one float of the same type together, as seen above.
== See also ==
* {{cmd|definemixedcolumns}}
{{Columns navbox}}
