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== Description ==
The {{cmd|textwidth}} command contains a value that represents the width of the current line on the page. The value is contextual in that if the current line is within a columnar environment, then {{cmd|textwidth}} returns the value of the current column width.(If this does not work out for you, try {{cmd|hsize}} instead.)
== Example ==
<context source=yes>
\starttext
\blackrule[height=1pt,width=\makeupwidth,]
\startcolumns[rule=on,]
\scale[maxwidth=\textwidth]{
This line avoids the scaled command and will be split using line breaks.
\stopcolumns
\blackrule[height=1pt,width=\makeupwidth,]
\stoptext
</context>