# Left aligned section title

I use a LaTeX template which center aligns all section titles. I want to left align these section titles but I do not know how. I tried

\begin{flushleft}
\section{\textbf{Introduction and Background}}
\end{flushleft}


but it has no effect on the section title (i.e., it is still centered). I tried

\begin{flushleft}
\textbf{Introduction and Background}
\end{flushleft}


and it is left aligned the word "Introduction and Background" but it is no longer a section title and thus the numbering using section number are all messed up.

I am new to LaTeX so please keep it simple.

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Welcome to TeX.SX. A tip: If you indent lines by 4 spaces, then they're marked as a code sample. You can also highlight the code and click the "code" button ({}). –  Claudio Fiandrino Sep 1 '12 at 11:36
Even when trying to keep it simple, knowing which template you use would be very helpful. :-) –  lockstep Sep 1 '12 at 11:42
Possible duplicate and here with centring instead of left align. –  Daryl Sep 1 '12 at 11:49
I used the AMS LaTex Article tamplate –  Lawrence Sep 1 '12 at 12:17
Thank you very much lockstep! It works –  Lawrence Sep 1 '12 at 12:35

\documentclass{amsart}

\makeatletter
\def\specialsection{\@startsection{section}{1}%
\z@{\linespacing\@plus\linespacing}{.5\linespacing}%
%  {\normalfont\centering}}% DELETED
{\normalfont}}% NEW
\def\section{\@startsection{section}{1}%
\z@{.7\linespacing\@plus\linespacing}{.5\linespacing}%
%  {\normalfont\scshape\centering}}% DELETED
{\normalfont\scshape}}% NEW
\makeatother

\begin{document}

\section{Introduction and Background}

\end{document}


Note that using formatting macros within section titles as in

\section{\textbf{Introduction and Background}}


is not the recommended way to make general changes. You should rather use

\normalfont\scshape\bfseries


in the definition of \section (and make sure to use a font that provides bold small capitals).

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