New subsection for interpptstopts

docs/user-guide/utilities/fieldconvert.tex

@@ -638,6 +638,13 @@ This module  runs in parallel for the line, plane and box extraction of points.
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+\subsection{Interpolate a set of points to another: \textit{interpptstopts} module}
+You can interpolate one set of points to another using the following command:
+\begin{lstlisting}[style=BashInputStyle]
+FieldConvert -m interpptstopts:...
+%
+%
+%
 \subsection{Isocontour extraction: \textit{iscontour} module}
 
 Extract an isocontour from a field file. This option automatically