diff --git a/callback.c b/callback.c
index 243ac7b..38992af 100644
--- a/callback.c
+++ b/callback.c
@@ -166,11 +166,12 @@ void on_axis_value_change(GtkAdjustment *adjustment, gpointer data)
 /******************************************************************************/
 /*                             B U T T O N S                                  */
 /******************************************************************************/
-void on_toggle_model_exec (GtkWidget *btt_run_stop_model_exec, gpointer data) {}
-void on_toggle_exec_edit (GtkWidget *btt_exec_xor_edit, GtkWidget *btt_run_stop_model_exec) {
-//    gtk_button_set_icon_name (GTK_BUTTON (btt_exec_xor_edit), "power-profile-balanced-rtl-symbolic");
-//    gtk_button_set_label (GTK_BUTTON (btt_run_stop_model_exec), " run ");
-//    gtk_widget_set_sensitive (GTK_WIDGET (btt_run_stop_model_exec), TRUE);
+void on_toggle_MODEL_RUN_STOP (GtkWidget *btt_MODEL_RUN_STOP, gpointer data){}
+void on_toggle_EXEC_EDIT (GtkWidget *btt_XOR_EXEC_EDIT, GtkWidget *btt_MODEL_RUN_STOP) {
+  gtk_button_set_icon_name (GTK_BUTTON (btt_XOR_EXEC_EDIT), "power-profile-balanced-rtl-symbolic");
+  gtk_button_set_icon_name (GTK_BUTTON (btt_XOR_EXEC_EDIT), "preferences-system-symbolic");
+  gtk_button_set_label (GTK_BUTTON (btt_MODEL_RUN_STOP), " run ");
+  gtk_widget_set_sensitive (GTK_WIDGET (btt_MODEL_RUN_STOP), TRUE);
 }
 
 
diff --git a/callback.h b/callback.h
index 1523c7d..ac26745 100644
--- a/callback.h
+++ b/callback.h
@@ -14,8 +14,8 @@ void on_glarea_unrealize (GtkWidget *widget);
 
 void on_axis_value_change (GtkAdjustment *adjustment, gpointer data);
 
-void on_toggle_exec_edit (GtkWidget *btt_exec_xor_edit, GtkWidget *btt_run_stop_model_exec);
-void on_toggle_model_exec (GtkWidget *btt_run_stop_model_exec, gpointer data);
+void on_toggle_EXEC_EDIT (GtkWidget *btt_XOR_EXEC_EDIT, GtkWidget *btt_MODEL_RUN_STOP);
+void on_toggle_MODEL_RUN_STOP (GtkWidget *btt_MODEL_RUN_STOP, gpointer data);
 
 void on_open_STATE (GtkWidget *btt_open_STATE, gpointer data);
 void on_open_RULES (GtkWidget *btt_open_RULES, gpointer data);
diff --git a/contain.c b/contain.c
index 2d6515b..785400f 100644
--- a/contain.c
+++ b/contain.c
@@ -164,18 +164,17 @@ void window_header_bar (GtkWindow *window, char *title){
 
   gpointer no_local_data = NULL;
 
-  GtkButton *exec_xor_edit = GTK_BUTTON (gtk_toggle_button_new ());
-  gtk_button_set_icon_name (exec_xor_edit, "system-run-symbolic");
-  gtk_button_set_icon_name (exec_xor_edit, "power-profile-balanced-rtl-symbolic");
-//  g_signal_connect (exec_xor_edit, "clicked", G_CALLBACK (on_toggle_exec_edit), run_stop_model_exec);
+  GtkButton *btt_MODEL_RUN_STOP = GTK_BUTTON (gtk_button_new_with_label (" run "));
+  g_signal_connect (btt_MODEL_RUN_STOP, "clicked", G_CALLBACK (on_toggle_MODEL_RUN_STOP), no_local_data);
+
+  GtkButton *btt_XOR_EXEC_EDIT = GTK_BUTTON (gtk_toggle_button_new ());
+  gtk_button_set_icon_name (btt_XOR_EXEC_EDIT, "system-run-symbolic");
+  gtk_button_set_icon_name (btt_XOR_EXEC_EDIT, "power-profile-balanced-rtl-symbolic");
+  g_signal_connect (btt_XOR_EXEC_EDIT, "clicked", G_CALLBACK (on_toggle_EXEC_EDIT), btt_MODEL_RUN_STOP);
 
 //  GtkWidget* separe = gtk_separator_new (GTK_ORIENTATION_VERTICAL);
 //  gtk_header_bar_pack_start (GTK_HEADER_BAR (header_bar), GTK_WIDGET (separe));
-
-  GtkWidget *any_Label = GTK_WIDGET (gtk_label_new ("------------"));
-
-  GtkButton *run_stop_model_exec = GTK_BUTTON (gtk_button_new_with_label (" run "));
-  g_signal_connect (run_stop_model_exec, "clicked", G_CALLBACK (on_toggle_model_exec), no_local_data);
+  GtkWidget *any_Label = GTK_WIDGET (gtk_label_new ("   |   "));
 
   GtkCheckButton *group_STATE_RULES_DATA = GTK_CHECK_BUTTON (gtk_check_button_new ());
 
@@ -193,8 +192,8 @@ void window_header_bar (GtkWindow *window, char *title){
 
   gtk_check_button_set_active (GTK_CHECK_BUTTON (btt_open_STATE), TRUE);
 
-  gtk_header_bar_pack_start (GTK_HEADER_BAR (header_bar), GTK_WIDGET (exec_xor_edit));
-  gtk_header_bar_pack_start (GTK_HEADER_BAR (header_bar), GTK_WIDGET (run_stop_model_exec));
+  gtk_header_bar_pack_start (GTK_HEADER_BAR (header_bar), GTK_WIDGET (btt_XOR_EXEC_EDIT));
+  gtk_header_bar_pack_start (GTK_HEADER_BAR (header_bar), GTK_WIDGET (btt_MODEL_RUN_STOP));
   gtk_header_bar_pack_start (GTK_HEADER_BAR (header_bar), GTK_WIDGET (any_Label));
   gtk_header_bar_pack_start (GTK_HEADER_BAR (header_bar), GTK_WIDGET (btt_open_STATE));
   gtk_header_bar_pack_start (GTK_HEADER_BAR (header_bar), GTK_WIDGET (btt_open_RULES));