Strikethrough in LaTeX
Use the soul or ulem package for strikethrough text in LaTeX.
Quick answer
latex
\usepackage{soul} % in preamble
\st{This text is struck through.}Option 1: soul package
The soul package provides \st{} (strikethrough), plus \ul{} (underline) and \hl{} (highlight).
latex
\usepackage{soul}
\st{deleted text} % strikethrough
\ul{underlined text} % underline (robust version)
\hl{highlighted text} % yellow highlightOption 2: ulem package
The ulem package offers more strikethrough variants. By default it also replaces \emph with underlining — use normalem option to prevent that.
latex
\usepackage[normalem]{ulem}
\sout{standard strikethrough}
\xout{crossed out (hatched)}
\uwave{wavy underline}
\uuline{double underline}Colored strikethrough
Combine soul with xcolor to color the strikethrough line.
latex
\usepackage{soul, xcolor}
% Set color of the strikethrough line:
\setulcolor{red}
\setstcolor{red}
\st{deleted in red}Track-changes style
For academic revision markup (deleted text in red, added text in blue), combine color and strikethrough:
latex
\usepackage[normalem]{ulem}
\usepackage{xcolor}
\newcommand{\del}[1]{\textcolor{red}{\sout{#1}}}
\newcommand{\ins}[1]{\textcolor{blue}{#1}}
The result is \del{wrong} \ins{correct}.