add instructions how to add signature and subject

CHANGELOG

@@ -1,4 +1,5 @@
 Release: next
+- write usable version of user guide.
 - partially fix orphaned section headers for singualar use of \section and \subsection
   commands and give users the new adjustable lengths \cvsectionstretchability
   and \subsectionstretchability. In case \section and \subsection are used

manual/moderncv_userguide.tex

@@ -545,7 +545,8 @@ Some length adjustments can be made to the skill matrix and will be explained in
 
 \subsection{Letter of motivation}
 
-\todox{add short explanation of motivation letter. Maybe add instructions on how to insert a scanned signature}
+\todo{add short explanation of motivation letter.}
+To add a subject to the letter of motivation or close with your signature see sections \ref{section:add:subject} and \ref{section:add:signature}
 
 
 
@@ -869,6 +870,59 @@ The penalties must be between -100 and 9999. The higher the value the less likel
 
 
 \subsection{Tips and Tricks}
+\subsubsection{Including a scanned signature in letter of motivation}
+\label{section:add:signature}
+In case one wishes to add a scanned signature to the letter of motivation, place the following into your praeamble
+%%%% redefinition of makeletterclosing without printing Name and last name but inserting
+%%%% a signature png instead.
+\begin{lstlisting}
+  \makeatletter
+  \renewcommand*{\makeletterclosing}{
+    \@closing\\[3em]%
+    \includegraphics[height=1.5cm,width=5.5cm]{<signature.png>}
+    %   {\bfseries \@firstname~\@lastname}%
+    \ifthenelse{\isundefined{\@enclosure}}{}{%
+      \\%
+      \vfill%
+      {\color{color2}\itshape\enclname: \@enclosure}}}
+  \makeatother
+\end{lstlisting}
+
+\subsubsection{Including a subject in letter of motivation}
+\label{section:add:subject}
+In case you want to add a subject to you letter of motivation, add the following in the praeamble
+\begin{lstlisting}
+  %%%% redefine letterhead to add subject line
+  \makeatletter
+  \renewcommand*{\makeletterhead}{%
+    % recompute lengths (in case we are switching from letter to resume, or vice versa)
+    \recomputeletterlengths%
+    % recipient block
+    \begin{minipage}[t]{.5\textwidth}
+      \raggedright%
+      \addressfont%
+      {\bfseries\upshape\@recipientname}\\%
+      \@recipientaddress%
+    \end{minipage}
+    % date
+    \hfill% US style
+  %  \\[1em]% UK style
+    \@date\\[4em]% US informal style: "January 1, 1900"; UK formal style: "01/01/1900"
+    % opening
+    \raggedright%
+    {\bfseries\subject}\\[2em]
+    \@opening\\[1.5em]%
+    % ensure no extra spacing after \makelettertitle due to a possible blank line
+  %  \ignorespacesafterend% not working
+    \hspace{0pt}\par\vspace{-\baselineskip}\vspace{-\parskip}
+    }
+  \makeatother
+\end{lstlisting}
+The a subject can thereafter be added to the letter of motivation by 
+\begin{lstlisting}
+  \subject{<subject_text>}
+\end{lstlisting}
+
 \subsubsection{Legal disclaimer at the end of CV}
 Some countries (e.g. Italy) require to add the permission to treat the personal data contained in the CV. This can be achieved by the command \code{\\vfill}. At the end of the last entry to your 
 CV, add the following:%