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\startcomponent ma-cb-en-usersetups
\enablemode[**en-us]
\project ma-cb
\startchapter[title=User specifications]
\index{preamble}
\index{input file}
The setup area of your document is the area before
the \type{\starttext} command. For example:
\setuptyping
[escape=yes]
\definestartstop
[comment][style={\rm}]
\starttyping
/BTEX \comment{first line of your file} /ETEX
\setuplayout[width=25cm] /BTEX \comment{set the width of your text} /ETEX
/BTEX \comment{empty line for readability} /ETEX
\starttext /BTEX \comment{starts your text} /ETEX
Hello Hasselt. /BTEX \comment{your text} /ETEX
\stoptext /BTEX \comment{ends your text} /ETEX
\stoptyping
Note that the first line of this file is empty. However, this first line
is a preamble and can be used for specific user specifications. For example:
\starttyping
% engine=luatex /BTEX \comment{use the \type{luatex} engine} /ETEX
/BTEX \comment{empty line for readability} /ETEX
\setuplayout[width=25cm] /BTEX \comment{set the width of your text} /ETEX
/BTEX \comment{empty line for readability} /ETEX
\starttext /BTEX \comment{starts your text} /ETEX
Hello Hasselt. /BTEX \comment{your text} /ETEX
\stoptext /BTEX \comment{ends your text} /ETEX
\stoptyping
Note that \CONTEXT\ sees the text after the \type{ % }
sign in this first line not as a comment.
The preamble can have a meaning for both \CONTEXT\ and \SCITE:
\starttyping
% engine=pdftex interface=en modes=screen language=us
\starttext
Hello Hasselt.
\stoptext
\stoptyping
This will be interpreted as:
\starttabulate[|T||p|]
\NC engine=pdftex \NC \CONTEXT \EQ run as \PDFTEX \NC\NR
\NC interface=en \NC \CONTEXT \EQ expect english \CONTEXT\ commands (lexing) \NC\NR
\NC \NC \SCITE \EQ use english lexing \NC\NR
\NC modes=screen \NC \CONTEXT \EQ invoke mode \type{screen} that is set in the text \NC\NR
\NC language=uk \NC \SCITE \EQ use the english spell checker \NC\NR
\stoptabulate
\stopchapter
\stopcomponent
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