diff --git a/index.ipynb b/index.ipynb
index 9f3014d..0761a8a 100644
--- a/index.ipynb
+++ b/index.ipynb
@@ -239,6 +239,10 @@
    "source": [
     "Then we define a `DashComponent` that takes a plot_factory and build a layout with two dropdowns and a graph.\n",
     "\n",
+    "- The layout is defined in the `layout(self, params=None)` method\n",
+    "- Callbacks are defined in the `component_callbacks(self, app)` method \n",
+    "\n",
+    "\n",
     "- By calling `super().__init__()` all parameters are automatically stored to attributes (so that we can access \n",
     "    e.g. `self.hide_country_dropdown`), and to a `._stored_params` dict (which can then be exported to `.yaml`)\n",
     "- This layout makes use of the `make_hideable()` staticmethod, to conditionally \n",