[Tex/LaTex] How to change the font size in elsarticle class

Question

First I used elsart and as usual the text font was 12pt, title font was 17pt bold, author font was 14.5pt and the address font was 11pt. but in elsarticle class, text font is 10pt, title is 14.5pt and not bold, author's 10pt and address font is 8pt. Which one is standard and how can I change them all like a set?

Answer 1

Which one is standard?

The migration to a newer document class should be considered the "current" standard (since 17 December 2009). So, using elsarticle should be what you go with if you're producing a publication for Elsevier.

How can I change them all like a set?

You should modify this at the document-level, rather than on an individual basis. The reason for this is that the other font sizes of document elements are relative to the base, most likely set using font switches like \small, \large, etc. Using

\documentclass{elsarticle}

creates a 10pt default text font size (since it's based on the classic article document class). You can also try class options 11pt or 12pt, which is supported by default.

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Here are some more details regarding elsarticle:

The title (or \maketitle under the final or default option) is set using \MaketitleBox:

\long\def\MaketitleBox{%
  \resetTitleCounters
  \def\baselinestretch{1}%
  \begin{center}%
    \def\baselinestretch{1}%
    \Large\@title\par\vskip18pt
    \normalsize\elsauthors\par\vskip10pt
    \footnotesize\itshape\elsaddress\par\vskip36pt
    \hrule\vskip12pt
    \ifvoid\absbox\else\unvbox\absbox\par\vskip10pt\fi
    \ifvoid\keybox\else\unvbox\keybox\par\vskip10pt\fi
    \hrule\vskip12pt
  \end{center}%
}

setting the title in \Large (not bold), the author in \normalsize and the address in \footnotesize. If you want a bold title (\bfseries), 14.5pt authors (\large or 14.4pt under 12pt) and 11pt address (\small or 10.95pt under 12pt), you need to use

\documentclass[12pt]{elsarticle}% `\normalsize is 12pt
\title{{\bfseries My title}}% Bold title, 17.28pt
\author{\large An Author}% \large or 14.4pt author
\address{\small Random City}% \small or 10.95pt address
\begin{document}
\maketitle
%...
\end{document}