diff --git a/include/ui.h b/include/ui.h
index 31ed441..2eb1f25 100644
--- a/include/ui.h
+++ b/include/ui.h
@@ -128,3 +128,5 @@ void onTreeViewRowActivated (GtkTreeView *view, GtkTreePath *path,
 
 void tree_c_test(void);
 
+GtkWidget *create_tree_label(void);
+
diff --git a/src/main.c b/src/main.c
index c5941c4..c14cf64 100644
--- a/src/main.c
+++ b/src/main.c
@@ -32,8 +32,6 @@
 
 int main(int argc, char **argv)
 {
-    tree_c_test();
-
     g_autoptr(GemGraphClientApplication) app = NULL;
     int res;
 
diff --git a/src/ui/gemgraph.ui b/src/ui/gemgraph.ui
index 5bab8c7..48b050d 100644
--- a/src/ui/gemgraph.ui
+++ b/src/ui/gemgraph.ui
@@ -81,15 +81,6 @@
                                 <property name="child">
                                   <object class="GtkBox" id="runlib_objects">
                                     <property name="orientation">vertical</property>
-                                    <child>
-                                      <object class="GtkLabel" id="label_runlib_objects">
-                                        <property name="justify">center</property>
-                                        <property name="label" translatable="yes">&lt;b&gt;Here must be a label (then a tree)&lt;/b&gt;</property>
-                                        <property name="use-markup">True</property>
-                                        <property name="margin-top">50</property>
-                                        <property name="margin-bottom">50</property>
-                                      </object>
-                                    </child>
                                   </object>
                                 </property>
                               </object>
diff --git a/src/ui/window.c b/src/ui/window.c
index ddbce57..25f1539 100644
--- a/src/ui/window.c
+++ b/src/ui/window.c
@@ -119,12 +119,22 @@ void ui_set_stack(const char *mode)
 
     // Switch on the first letter of the mode, because switch is soooo simple :)
     switch(mode[0]) {
-        case 'e': gtk_menu_button_set_icon_name(window->main_button_mode, "document-edit-symbolic");        break;
-        case 'r': gtk_menu_button_set_icon_name(window->main_button_mode, "system-run-symbolic");           break;
-        case 'p': gtk_menu_button_set_icon_name(window->main_button_mode, "x-office-presentation-symbolic");break;
-        case 'h': gtk_paned_set_position(window->main_paned, 0);
-                  gtk_menu_button_set_icon_name(window->main_button_mode, "user-home-symbolic");            break;
-        default: break;
+        case 'e':
+            gtk_menu_button_set_icon_name(window->main_button_mode, "document-edit-symbolic");
+            break;
+        case 'r':
+            gtk_menu_button_set_icon_name(window->main_button_mode, "system-run-symbolic");
+            create_tree_label();
+            break;
+        case 'p':
+            gtk_menu_button_set_icon_name(window->main_button_mode, "x-office-presentation-symbolic");
+            break;
+        case 'h':
+            gtk_paned_set_position(window->main_paned, 0);
+            gtk_menu_button_set_icon_name(window->main_button_mode, "user-home-symbolic");
+            break;
+        default:
+            break;
     }
 }
 
@@ -220,3 +230,16 @@ void ui_toggle_sidebar(void)
     else               gtk_paned_set_position(window->main_paned, 400);
 }
 
+GtkWidget *create_tree_label(void)
+{
+    GtkWidget *label, *slider;
+    GtkAdjustment *adj;
+    const char *text = "HELLO !";
+
+    label = gtk_label_new(text);
+    gtk_box_append(GTK_BOX(window->runlib_objects), label);
+    gtk_widget_show(label);
+
+    return label;
+}
+