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in align environment, my tags are on the right, and that is fine. but in some paragraphs I'd want to put my tags on the left. How can I do this?

presh
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  • Welcome to Tex.SE :) // Please post (relevant part of) your code. Latex is complex, so more often than not there is no generic answer to "open" questions like yours wihtout seeing specific code ;-) Thanks – MS-SPO Apr 28 '22 at 15:41
  • See https://tex.stackexchange.com/a/193538/263192 or https://tex.stackexchange.com/a/212099/263192 –  Apr 28 '22 at 15:42

1 Answers1

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Define \leqnomode, then use it locally.

\documentclass{article}

\usepackage{amsmath}


\makeatletter
\newcommand{\leqnomode}{\tagsleft@true\let\veqno@@leqno}
%\newcommand{\reqnomode}{\tagsleft@false\let\veqno@@eqno}
\makeatother
\begin{document}


\begin{align}
  f(x) &= ax^2 + bx + c \
  g(x) &= dx^2 + ex + f
\end{align}


\begin{equation}\leqnomode
  -\Delta\phi=4\pi k\rho.
\end{equation}


\begin{equation}
  a^2+b^2=c^2.
\end{equation}


\end{document}

enter image description here

By the way, please give a minimal working example when to ask a question next time to make others answer conveniently.

M. Logic
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