+Properties of image files include
+\begin{itemize}\itemsep=0pt
+ \item Whether the image is real or complex valued
+ \item Numeric statistics
+ \item Image file labels
+\end{itemize}
+
+\subsection{File - Export}
+This command allows for exporting image files to a standard
+graphics file format. This is helpful when you want to take an
+image and import it into another application. The current
+\helprefn{intensity scale}{intensityscale} is used when exporting
+the file. The support file formats are:
+
+\begin{description}\itemsep=0pt
+\item[PNG]Portable Network Graphics format. This uses 8-bits or
+256 shades of gray.
+
+\item[PNG-16]This is a 16-bit version of PNG which allows for
+65536 shades of gray.
+\item[PGM]Portable Graymap format. This is a common format used on
+UNIX systems.
+\item[PGM]ASCII version of PGM.
+\end{description}
+
+
+\subsection{View}\label{intensityscale}
+These options are for change the intensity scale for viewing the image.
+They do not change the image data.
+\subsubsection{Set}
+This command brings up a dialog box that allows you to set the lower
+and upper intensities to display.
+
+\subsubsection{Auto}
+This command brings up a dialog box that allows \ctsim\ to automatically
+make an intensity scale. The options that \ctsim\ needs to make this
+automatic scale are:
+
+\begin{description}\itemsep=0pt
+\item[Center] This sets the center of the intensity scale. Currently,
+\ctsim\ allows you to use either the mean, mode, or median of the image
+as the center of the intensity scale.
+
+\item[Width] This sets the half-width of the intensity scale. The width
+is specified as a ratio of the standard deviation.
+\end{description}
+
+As an example, if \texttt{median} is selected as the center and
+\texttt{0.5} is selected as the width, the the minimum intensity will
+be \texttt{median - 0.5 x standard deviation} and the maximum will be
+\texttt{median + 0.5 x standard deviation}.
+
+\subsubsection{Full}
+This resets the intensity scale to the full scale of the image.