Say 'value of the variable' instead

As suggested by Hans in review comment.

chapters/annotations.tex

@@ -1362,7 +1362,7 @@ \section{Annotations for the Graphical User Interface}\label{annotations-for-the
 The annotations \lstinline!tab! and \lstinline!group! define the placement of the component or of variables in a dialog with optional tab and group specification, where the empty string (default) means tool-specific group.
 The idea is that a tool may as default place parameters in the group ``Parameters'' in the tab ``General'', but add e.g., variables with \lstinline!showStartAttribute=true! to another group.
 If \lstinline!enable = false!, the input field may be disabled and no input can be given.
-If \lstinline!showStartAttribute = true! the dialog should allow the user to set the start-value and the \lstinline!fixed! attribute for the variable instead of the variable value.
+If \lstinline!showStartAttribute = true! the dialog should allow the user to set the start-value and the \lstinline!fixed! attribute for the variable instead of the value of the variable.
 
 \begin{nonnormative}
 The \lstinline!showStartAttribute = true! is primarily intended for non-parameter values and avoids introducing