+\label{sec:grmisc}
+
+
+\subsection{Frame user attributes}
+
+The function \fnref{WFrame.set_grattr} may be used to give frames
+(and their tabs) arbitrary extra attributes to be passed to the
+drawing engine. Hence, by configuring such substyles in the style
+configuration files, and turning on the attribute when needed,
+scripts may display visual cues related to the frame. There is
+also one extra attribute specially interpreted by the default
+drawing engine: the \codestr{numbered} attribute, which causes
+numbers to be displayed on the tabs.
+
+
+\subsection{Extra fields for style \codestr{frame}}