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  \item{title}{a character string to be used as the title of the menu.
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  \item{title}{a character string to be used as the title of the menu.
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    \code{NULL} is also accepted.}
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    \code{NULL} is also accepted.}
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}
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}
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\details{
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\details{
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  If \code{graphics = TRUE} and a windowing system is available
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  If \code{graphics = TRUE} and a windowing system is available
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  (Windows, OS X or X11 \emph{via} Tcl/Tk) a listbox widget is
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  (Windows, macOS or X11 \emph{via} Tcl/Tk) a listbox widget is
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  used, otherwise a text menu.  It is an error to use \code{menu} in a
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  used, otherwise a text menu.  It is an error to use \code{menu} in a
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  non-interactive session.
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  non-interactive session.
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  Ten or fewer items will be displayed in a single column, more in
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  Ten or fewer items will be displayed in a single column, more in
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  multiple columns if possible within the current display width.
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  multiple columns if possible within the current display width.