-\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
+\subsection{View}\label{intensityscale}\index{Intensity scale}
+These commands are used change the intensity scale for viewing the image.
+These commands do not change the image data. When the minimum intensity is
+set, then the color pure black is assigned to that image intensity. Similarly,
+when the maximum intensity is set, the the color pure white is assigned to that
+image value.
+
+Changing the intensity scale is useful when examining different image features.
+In clinical medicine, the intensity scale is often changed to examine bone
+(high intensity) verses soft-tissue (medium intensity) features.
+
+\subsubsection{Set}\label{IDH_DLG_MINMAX}
+This command displays a dialog box that allows you to set the lower