modified: ../config/sidebar.yml

	modified:   part2/adding_detectors.md
	new file:   part3/simulating_detectors.md
	new file:   part4/sensitive_detector.md

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'

src/docs/part2/adding_detectors.md

 ---
-title: 'Tutorial Part 1'
+title: 'Tutorial Part 2: Modifying and Adding Detectors '
 ---
 
   * [Introduction](#introduction)

src/docs/part3/simulating_detectors.md

+---
+title: 'Tutorial Part 3: Running the Simulation'
+---
+
+To be completed.
+

src/docs/part4/sensitive_detector.md

+---
+title: 'Sensitive Detector'
+---
+
+To be completed.