diff --git a/demos/gtk-demo/tree_store.c b/demos/gtk-demo/tree_store.c
index 0c97d9d..c3a2efb 100644
--- a/demos/gtk-demo/tree_store.c
+++ b/demos/gtk-demo/tree_store.c
@@ -28,6 +28,20 @@
 /*************************************************************************************************************************************/
 
 
+// -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   - //
+
+
+/********************************      S O M E    L I T T L E    T H I N G S    T O    K N O W      **********************************/
+/*                                                                                                                                   */
+/*  gtk_tree_view_set_show_expanders (GTK_TREE_VIEW (treeview), TRUE);                                                               */
+/*  gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (treeview), TRUE);                                                              */
+/*  GTK_TREE_VIEW (treeview) expanders are shown;                                                                                    */
+/*  gtk_widget_set_vexpand (treeview, TRUE);                                                                                         */
+/*  gtk_tree_view_set_reorderable (GTK_TREE_VIEW (treeview), TRUE);                                                                  */
+/*                                                                                                                                   */
+/*************************************************************************************************************************************/
+
+
 /* The GtkTreeStore is used to store data in tree form, to be used later on by a GtkTreeView to display it.
  * This demo builds a simple GtkTreeStore and displays it.
  * If you're new to the GtkTreeView widgets and associates, look into the GtkListStore example first.  */
@@ -172,6 +186,7 @@ do_tree_store (GtkWidget *do_widget)
       /* create tree view */
       treeview = gtk_tree_view_new_with_model (model);
       gtk_widget_set_vexpand (treeview, TRUE);
+      if (1) gtk_tree_view_set_reorderable (GTK_TREE_VIEW (treeview), TRUE);
       g_object_unref (model);
       gtk_tree_selection_set_mode (gtk_tree_view_get_selection (GTK_TREE_VIEW (treeview)),
                                    GTK_SELECTION_MULTIPLE);