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authorNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
committerNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
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+\documentclass[pagesize=auto]{scrartcl}
+
+\usepackage{fixltx2e}
+\usepackage{lmodern}
+\usepackage[T1]{fontenc}
+\usepackage{textcomp}
+\usepackage{booktabs}
+\usepackage{microtype}
+\usepackage{hyperref}
+
+\newcommand*{\meta}[1]{\textlangle\textsl{#1}\textrangle}
+\newcommand*{\marg}[1]{\texttt{\{}\meta{#1}\texttt{\}}}
+\newcommand*{\cmd}[1]{\texttt{\string#1}}
+
+\addtokomafont{title}{\rmfamily}
+
+\title{The \textsf{cancel} package\thanks{This manual corresponds to \textsf{cancel}~v2.2, dated~12--Apr--2013.}}
+\author{Donald Arseneau\\\href{mailto:asnd@triumf.ca}{\texttt{asnd@triumf.ca}}}
+\date{12--Apr--2013}
+\publishers{I contribute this software to the public domain. No rights reserved.}
+
+
+\begin{document}
+
+\maketitle
+
+\section{Commands:}
+
+
+
+\begin{labeling}{\cmd{\cancelto}\marg{value}\marg{expression}}
+\item[\cmd{\cancel}] draws a diagonal line (slash) through its argument.
+\item[\cmd{\bcancel}] uses the negative slope (a backslash).
+\item[\cmd{\xcancel}] draws an X (actually \cmd{\cancel} plus \cmd{\bcancel}).
+\item[\cmd{\cancelto}\marg{value}\marg{expression}] draws a diagonal arrow through the \meta{expression}, pointing to the \meta{value}.
+\end{labeling}
+%
+The first three work in math and text mode, but \cmd{\cancelto} is only
+for math mode.
+The slope of the line or arrow depends on what is being cancelled.
+
+
+\section{Options:}
+
+By default, none of these commands affects the horizontal spacing,
+so they might over-print neighboring parts of the formula (or text).
+They do add their height to the expression, so there should never be
+unintended vertical overlap. There is a package option \texttt{[makeroom]} to
+increase the horizontal spacing to make room for the cancellation value.
+
+If you use the color package, then you can declare
+%
+\begin{verbatim}
+ \renewcommand{\CancelColor}{<color_command>}
+\end{verbatim}
+%
+and the cancellation marks will be printed in that color (e.\,g., \cmd{\blue}).
+However, if you are using color, I recommend lightly shaded blocks rather
+than diagonal arrows for cancelling.
+
+The option \texttt{[thicklines]} asks for heavier lines and arrows. This may be
+useful when the lines are colored a light shade.
+
+\begin{samepage}
+ The size (math style) of the \cmd{\cancelto} value depends on package options
+ according to this table:
+ %
+ \begin{center}
+ \small
+ \begin{tabular}{@{}llll@{}}
+ \toprule
+ \textbf{Current style} & \textbf{\texttt{[samesize]}} & \textbf{\texttt{[smaller]}} & \textbf{\texttt{[Smaller]}} \\
+ \midrule
+ \cmd{\displaystyle} & \cmd{\displaystyle} & \cmd{\textstyle} & \cmd{\scriptstyle} \\
+ \cmd{\textstyle} & \cmd{\textstyle} & \cmd{\scriptstyle} & \cmd{\scriptstyle} \\
+ \cmd{\scriptstyle} & \cmd{\scriptstyle} & \cmd{\scriptscriptstyle} & \cmd{\scriptscriptstyle} \\
+ \cmd{\scriptscriptstyle} & \cmd{\scriptscriptstyle} & \cmd{\scriptscriptstyle} & \cmd{\scriptscriptstyle} \\
+ \bottomrule
+ \end{tabular}
+ \end{center}
+ %
+ (``\texttt{smaller}'' is the default behavior. It gives textstyle limits in
+ displaystyle, whereas ``\texttt{Smaller}'' gives scriptstyle limits.)
+\end{samepage}
+
+This package is provided without guarantees or support. Drawing slashes
+through math to indicate ``cancellation'' is poor design. I don't recommend
+that you use this package at all.
+
+\end{document}