\documentclass[10pt, a4paper, oneside]{article} \usepackage{extarrows} \def\test#1/{% \texttt{\textbackslash #1:}\qquad& A\csname #1\endcsname[\text{to love}]{\text{we love}}Z} \def\tfst #1/{% \texttt{\textbackslash #1:}\qquad& A\csname #1\endcsname[]{}Z} \begin{document} \section{Syntax} \begin{verbatim} \arrowname[sub-script]{super-script} \end{verbatim} \noindent \texttt{arrowname} is \texttt{xlongequal}, \texttt{xLongleftarrow}, etc. \noindent The parameter \verb"[sub-script]" is optional. \section{Examples} \begin{align} \test xlongequal/\\[5mm] \test xLongleftarrow/\\ \test xLongrightarrow/\\ \test xLongleftrightarrow/\\ \test xLeftrightarrow/\\[3mm] \test xlongleftrightarrow/\\ \test xlongrightarrow/\\[5mm] \test xleftrightarrow/\\ \test xlongleftarrow/\\%[2mm] (amsmath)\; \test xleftarrow/\\ (amsmath)\; \test xrightarrow/\\[3mm] \tfst xlongleftarrow/\\ \tfst xlongrightarrow/\\ (amsmath)\; \tfst xleftarrow/\\ (amsmath)\; \tfst xrightarrow/ \end{align} \end{document}