diff --git a/src/config/sidebar.yml b/src/config/sidebar.yml
index 7c843749ddbcace9762d83d6ea4833bf66046c4f..9a1572c552debd3add6aea9a2f759c051c21d6b6 100644
--- a/src/config/sidebar.yml
+++ b/src/config/sidebar.yml
@@ -22,6 +22,10 @@
       link: '/part1/simple_detector'
     - label: 'Part 2: Adding Detectors'
       link: '/part2/adding_detectors'
+    - label: 'Part 3: Runing the Simulating'
+      link: '/part3/simulating_detectors'
+    - label: 'Part 4: Sensitive Detectors'
+      link: '/part4/sensitive_detector'
 - label: References
   items:
     - label: 'DD4hep Manual'
diff --git a/src/docs/part2/adding_detectors.md b/src/docs/part2/adding_detectors.md
index 87c8bde3f3be5bfb79f11a60d8ea98a8da436ecf..b13e1d8242c94f897e79b328d6d28d06ce876a08 100644
--- a/src/docs/part2/adding_detectors.md
+++ b/src/docs/part2/adding_detectors.md
@@ -1,5 +1,5 @@
 ---
-title: 'Tutorial Part 1'
+title: 'Tutorial Part 2: Modifying and Adding Detectors '
 ---
 
   * [Introduction](#introduction)
diff --git a/src/docs/part3/simulating_detectors.md b/src/docs/part3/simulating_detectors.md
new file mode 100644
index 0000000000000000000000000000000000000000..1a98fc57f35507ac553440b8dd9882d1aea1379e
--- /dev/null
+++ b/src/docs/part3/simulating_detectors.md
@@ -0,0 +1,6 @@
+---
+title: 'Tutorial Part 3: Running the Simulation'
+---
+
+To be completed.
+
diff --git a/src/docs/part4/sensitive_detector.md b/src/docs/part4/sensitive_detector.md
new file mode 100644
index 0000000000000000000000000000000000000000..37a38681f9777e9c627f6b9a7f57ea8ee1e7b198
--- /dev/null
+++ b/src/docs/part4/sensitive_detector.md
@@ -0,0 +1,5 @@
+---
+title: 'Sensitive Detector'
+---
+
+To be completed.