%% %% An UIT Edition example %% %% Example 09-17-4 on page 187. %% %% Copyright (C) 2010 Herbert Voss %% %% It may be distributed and/or modified under the conditions %% of the LaTeX Project Public License, either version 1.3 %% of this license or (at your option) any later version. %% %% See http://www.latex-project.org/lppl.txt for details. %% %% %% ==== % Show page(s) 1 %% \documentclass[]{exaarticle} \pagestyle{empty} \setlength\textwidth{177.70511pt} \AtBeginDocument{\setlength\parindent{0pt}} \usepackage[ngerman]{babel} \setcounter{equation}{22} \renewcommand\theequation{9.\arabic{equation}} \StartShownPreambleCommands \usepackage{mathtools} \newtagform{angels}{<}{>} \StopShownPreambleCommands \begin{document} \mathtoolsset{showonlyrefs,showmanualtags} \usetagform{angels} \begin{gather} a = a \label{eq:a}\\ b = b\label{eq:b}\tag{**} \end{gather} \mathtoolsset{showmanualtags=false} A reference to Equation~\refeq{eq:a} (a). \usetagform{default}% change the labeling \begin{align} c &= c \label{eq:c}\\ d &= d\label{eq:d}\tag{!!} \end{align} A reference to Equation~\refeq{eq:e} (e). Label (!!) is not shown now! \begin{align} e = e \label{eq:e}\end{align} Reset the default. \mathtoolsset{showonlyrefs=false} \begin{align} f = f \label{eq:f}\end{align} \end{document}