diff --git a/exec.o b/exec.o
index c6c694e..fae49ca 100755
Binary files a/exec.o and b/exec.o differ
diff --git a/main.c b/main.c
index 771ecd0..2d857cc 100755
--- a/main.c
+++ b/main.c
@@ -44,9 +44,9 @@ static void activate (GtkApplication *app, gpointer user_data) {
 // https://docs.gtk.org/gtk4/enum.AccessibleRole.html
 
 //  GtkToggleButton *tb1 =  GTK_TOGGLE_BUTTON (gtk_button_new_with_label ("tb1"));
-  gtk_stack_add_titled (stack, page_1, "1", "A");
-  gtk_stack_add_titled (stack, page_2, "2", "B");
-  GtkStackPage *page_3 =  gtk_stack_add_titled (stack, grid_3, "3", "C");
+  gtk_stack_add_titled (stack, page_1, "n°0", "A");
+  gtk_stack_add_titled (stack, page_2, "n°1", "B");
+  GtkStackPage *page_3 =  gtk_stack_add_titled (stack, grid_3, "n°2", "C");
   gtk_grid_attach (GTK_GRID (grid_3), button_5, 0, 0, 1, 1);
 
 
@@ -56,12 +56,15 @@ static void activate (GtkApplication *app, gpointer user_data) {
   gtk_stack_switcher_set_stack (GTK_STACK_SWITCHER (switcher), stack);
 //  gtk_stack_sidebar_set_stack (GTK_STACK_SIDEBAR (sidebar), stack);
 
-  gtk_stack_page_get_child (GTK_STACK_PAGE(page_1));
+//  gtk_stack_page_get_child (GTK_STACK_PAGE(page_1));
 //  gtk_stack_page_set_name (GTK_STACK_PAGE(page_1), "new name");
-  gtk_stack_set_visible_child_name (stack, "3");
-  printf("visible is page [%s] whose name is : %s\n",
-         gtk_stack_page_get_title (page_3),
-         gtk_stack_get_visible_child_name (stack));
+
+  GtkSelectionModel *stack_selection_model = gtk_stack_get_pages (stack);
+  gtk_selection_model_select_item (stack_selection_model, 0, 1);
+//  gtk_stack_set_visible_child_name (stack, "n°3");
+
+  printf("selected page name is [%s]  (can't get its title !)\n",
+          gtk_stack_get_visible_child_name (stack));
   gtk_stack_set_transition_type (GTK_STACK (stack),
                                GTK_STACK_TRANSITION_TYPE_CROSSFADE);