+\texttt{if2 input-filename1 input-filename2 output-filename [options...]}
+
+\textbf{Options}
+
+\begin{twocollist}
+ \twocolitem{\doublehyphen{add}}{Add the two images.}
+ \twocolitem{\doublehyphen{sub}}{Subtract the two images.}
+ \twocolitem{\doublehyphen{multiply}}{Multiply the two images.}
+ \twocolitem{\doublehyphen{divide}}{Divide the two images.}
+ \twocolitem{\doublehyphen{comp}}{Statistically compare the two images. The standard
+ \helpref{three distance measurements}{conceptimagecompare} are reported.}
+ \twocolitem{\doublehyphen{column-plot n}}{Plot the values of a particular column. The plot file is saved to disk.}
+ \twocolitem{\doublehyphen{row-plot n}}{Plot the values of a particular row. The plot file is saved to disk.}
+\end{twocollist}
+
+\section{ifexport}\label{ifexport}\index{ifexport}%
+Export an image file to a standard graphics file.
+
+\usage
+\texttt{ifexport input-filename output-filename [options...]}
+
+\textbf{Options}
+
+\begin{twocollist}
+ \twocolitem{\doublehyphen{format}}{