# using \newcommand in \includegraphics option to substitute graphic sizes

I'd like to define some figure/graphic sizes in the preamble and then reference those in the \includegraphics options throughout the document (this way, I can change the size once and it will change throughout the entire document). Here's an example of what I'm trying to do (it gives me a "package keyval error"):

%%
\documentclass[11pt]{article}
\usepackage{geometry}
\usepackage[demo]{graphicx}

%%GRAPHIC/FIGURE SIZES%%
%FULL PAGE GRAPHIC
\newcommand{\grfull}{width=6.25in,height=9.25in}
%LARGE GRAPHIC
\newcommand{\grlarge}{width=5.25in,height=6.5in}
%NORMAL GRAPHIC
\newcommand{\grnormal}{width=4.25in,height=5.25in}
%SMALL GRAPHIC (FOR WRAPFIG)
\newcommand{\grsmall}{width=3.5in,height=4.25in}
%TINY GRAPHIC (FOR SUBFIG)
\newcommand{\grtiny}{width=3.2in,height=3.8in}

\begin{document}

Here's the working figure:

\begin{figure}[htbp]
\centering
\includegraphics[width=3in,height=2in]{example}
\caption{example caption 1}
\label{fig:example1}
\end{figure}

The text substitution works here for \grtiny and for \grsmall .

Here's the non-working figure:

\begin{figure}[htbp]
\centering
\includegraphics[\grsmall]{example}
\caption{example caption 1}
\label{fig:example1}
\end{figure}

\end{document}
%%


Is \newcommand the right command for this task or should I be using something else?

-

It works if you use \expandafter for expanding your macro before \includegraphics is called:

\expandafter\includegraphics\expandafter[\grsmall]{example}

-

Another option is to define extra keys for the \includegraphics command, as demonstrated here:

includegraphics[page=\pageref... possible? how to set [page=] to a variable?

\documentclass[11pt]{article}
\usepackage{geometry}
\usepackage[demo]{graphicx}

%%GRAPHIC/FIGURE SIZES%%
\makeatletter
\define@key{Gin}{grlarge}[true]{%
\edef\@tempa{{Gin}{width=4.25in,height=6.5in}}%
\expandafter\setkeys\@tempa
}
\define@key{Gin}{grtiny}[true]{%
\edef\@tempa{{Gin}{width=3.2in,height=3.8in}}%
\expandafter\setkeys\@tempa
}
\makeatother

\begin{document}

Here's the working figure:

\begin{figure}[htbp]
\centering
\includegraphics[grtiny]{example}
\caption{example caption 1}
\label{fig:example1}
\end{figure}

\begin{figure}[htbp]
\centering
\includegraphics[grlarge]{example}
\caption{example caption 1}
\label{fig:example2}
\end{figure}

\end{document}

-