diff --git a/dialog.c b/dialog.c
index 9c01762..88fb46d 100644
--- a/dialog.c
+++ b/dialog.c
@@ -13,33 +13,31 @@
 /*  doc : see  >  on_dialog_window_activation (...)  in  callback.c   */
 
 void dialog_window_design (GtkWindow *main_window, GtkWindow *dialog_window){
-  char *title =  "     Do I need to save the current model before modifying it?     ";
+  char *title =  "     Save the current model before modifying it?     ";
   GtkWidget *header_bar = GTK_WIDGET (gtk_header_bar_new ());
   gtk_header_bar_set_title_widget (GTK_HEADER_BAR (header_bar), gtk_label_new (title));
   gtk_window_set_titlebar (dialog_window, header_bar);
 
-  GtkBox *YES_NO_box = GTK_BOX (gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 400));
-//  gtk_box_layout_new (GTK_ORIENTATION_HORIZONTAL);
-//  gtk_box_layout_set_homogeneous (GTK_BOX (YES_NO_box), TRUE);
-//  gtk_box_set_baseline_position (YES_NO_box, GTK_BASELINE_POSITION_CENTER);
+  GtkWidget *dialog_window_grid = gtk_grid_new ();
 
-  GtkButton *action_save_current_model = GTK_BUTTON (gtk_button_new_with_label ("SAVE THE CURRENT MODEL"));
+  const char *txt = "                           SAVE CURRENT MODEL                            ";
+  GtkButton *action_save_current_model = GTK_BUTTON (gtk_button_new_with_label (txt));
   gtk_widget_set_sensitive (GTK_WIDGET (action_save_current_model), FALSE);
-  g_signal_connect (action_save_current_model, "clicked", G_CALLBACK (on_WRITE_CURRENT_MODEL), dialog_window);
+  g_signal_connect (action_save_current_model, "clicked",
+                    G_CALLBACK (on_WRITE_CURRENT_MODEL), dialog_window);
 
   GtkButton *click_yes = GTK_BUTTON (gtk_button_new_with_label ("YES"));
-  g_signal_connect (click_yes, "clicked", G_CALLBACK (on_SAVE_CURRENT_MODEL_BEFORE_EDITING), action_save_current_model);
-  gtk_box_append (YES_NO_box, GTK_WIDGET (click_yes));
+  g_signal_connect (click_yes, "clicked",
+                    G_CALLBACK (on_SAVE_CURRENT_MODEL_BEFORE_EDITING), action_save_current_model);
 
   GtkButton *click_no = GTK_BUTTON (gtk_button_new_with_label ("NO"));
-  g_signal_connect (click_no, "clicked", G_CALLBACK (on_DISCARD_CURRENT_MODEL_AND_START_EDITING), dialog_window);
-  gtk_box_append (YES_NO_box, GTK_WIDGET (click_no));
+  g_signal_connect (click_no, "clicked",
+                    G_CALLBACK (on_DISCARD_CURRENT_MODEL_AND_START_EDITING), dialog_window);
 
-  GtkBox *WINDOW_CHILD_box = GTK_BOX (gtk_box_new (GTK_ORIENTATION_VERTICAL, 0));
-  gtk_box_append (WINDOW_CHILD_box, GTK_WIDGET (YES_NO_box));
-  gtk_box_append (WINDOW_CHILD_box, GTK_WIDGET (gtk_separator_new (GTK_ORIENTATION_VERTICAL)));
-  gtk_box_append (WINDOW_CHILD_box, GTK_WIDGET (action_save_current_model));
-  gtk_window_set_child (dialog_window, GTK_WIDGET (WINDOW_CHILD_box));
+  gtk_grid_attach (GTK_GRID (dialog_window_grid), GTK_WIDGET (click_yes), 0, 0, 1, 1) ;
+  gtk_grid_attach (GTK_GRID (dialog_window_grid), GTK_WIDGET (click_no), 1, 0, 1, 1) ;
+  gtk_grid_attach (GTK_GRID (dialog_window_grid), GTK_WIDGET (action_save_current_model), 0, 2, 2, 1) ;
+  gtk_window_set_child (GTK_WINDOW (dialog_window), GTK_WIDGET (dialog_window_grid));
 
   gtk_window_set_transient_for (GTK_WINDOW (dialog_window), GTK_WINDOW (main_window));
   gtk_window_set_destroy_with_parent (GTK_WINDOW (dialog_window), TRUE);