diff --git a/src/ui/contain.c b/src/ui/contain.c
index 03922cd..26e59ff 100644
--- a/src/ui/contain.c
+++ b/src/ui/contain.c
@@ -182,8 +182,11 @@ void experimental_activate_00 (GtkApplication *app, GtkWindow *window) {
   GtkWidget *my_header_bar = gtk_header_bar_new ();
   gtk_header_bar_set_title_widget (my_header_bar, GTK_WIDGET (gtk_label_new ("E coli   (with permission from David S. Goodsell, 2009)")));
   GtkWidget *run_edit = gtk_toggle_button_new ();
+  GtkWidget *run_edit2 = gtk_toggle_button_new ();
   gtk_button_set_icon_name (run_edit, "system-run-symbolic");
+  gtk_button_set_icon_name (run_edit2, "document-edit-symbolic");
   gtk_header_bar_pack_start (my_header_bar, run_edit);
+  gtk_header_bar_pack_start (my_header_bar, run_edit2);
   gtk_window_set_titlebar (window, my_header_bar);