Specify that extent and preserveAspectRatio use the same logic but se…

…parately.

Closes modelica#3219

chapters/annotations.tex

@@ -614,15 +614,15 @@ \subsubsection{Coordinate Systems}\label{coordinate-systems}
   GraphicItem[:] graphics;
 end Diagram;
 \end{lstlisting}
-The coordinate system (including \lstinline!preserveAspectRatio!) of a class is defined by the following priority:
+The coordinate system attributes (\lstinline!extent! and \lstinline!preserveAspectRatio!) of a class are separately defined by the following priority:
 \begin{enumerate}
 \item
   The coordinate system annotation given in the class (if specified).
 \item
   The coordinate systems of the first base class where the extent on the \lstinline!extends!-clause specifies a null-region (if any).
   Note that null-region is the default for base classes, see \cref{extends-clause}.
 \item
-  The default coordinate system \lstinline!CoordinateSystem(extent = {{-100, -100}, {100, 100}})!.
+  The default coordinate system \lstinline!CoordinateSystem(preserveAspectRatio=true, extent = {{-100, -100}, {100, 100}})!.
 \end{enumerate}
 
 \subsubsection{Graphical Properties}\label{graphical-properties}