diff --git a/include/ui.h b/include/ui.h
index fc19f48..ffa33d8 100644
--- a/include/ui.h
+++ b/include/ui.h
@@ -28,6 +28,8 @@
 
 #include "../include/base.h"
 
+#define COMMUTE 0
+
 #define W 1920
 #define H 960
 #define W_IMAGE W - 320
diff --git a/src/ui/application.c b/src/ui/application.c
index 81f32ba..4a9cef2 100644
--- a/src/ui/application.c
+++ b/src/ui/application.c
@@ -61,34 +61,29 @@ void ui_disable_action(const char *name) {
  */
 static void gem_graph_client_application_activate(GApplication *app)
 {
-    int commute_XML_ui_based_window = 1;
-
-    if (commute_XML_ui_based_window) {
+    if (COMMUTE) {
 
         GtkWindow *window;
 
-        g_assert(GEM_GRAPH_CLIENT_IS_APPLICATION(app));
+        g_assert(GEM_GRAPH_CLIENT_IS_APPLICATION (app));
 
-        window = gtk_application_get_active_window(GTK_APPLICATION (app));
+        window = gtk_application_get_active_window (GTK_APPLICATION (app));
         if (window == NULL)
-        window = g_object_new(GEM_GRAPH_CLIENT_TYPE_WINDOW,
+        window = g_object_new (GEM_GRAPH_CLIENT_TYPE_WINDOW,
                                "application", app,
                                NULL);
 
         // Launch with sidebar off
         ui_toggle_sidebar();
-        ui_set_stack(HOME_MODE);
+        ui_set_stack (HOME_MODE);
         ui_debug_model_loading (window, "data/models/dimers random walk.xml");
 
-        gtk_window_present(window);
+        gtk_window_present (window);
 
     } else {
 
         char *user_data = NULL;
-        experimental_activate (app, user_data);
-        //  in experimental_activate () are :
-        //  window = GTK_WINDOW (gtk_application_window_new (GTK_APPLICATION (app)));  and
-        //  gtk_window_present(window);
+        experimental_activate (app, user_data); // see  >  contain.c
     }
 }