/* for Column Menu */
void column_add (GtkWidget *w, gpointer *data);
void column_edit (GtkWidget *w, gpointer *data);
void column_delete (GtkWidget *w, gpointer *data);
void column_left (GtkWidget *w, gpointer *data);
void column_right (GtkWidget *w, gpointer *data);
void new_file (GtkWidget *w, gpointer *data);

gint16 go_edit_column ();