modified: ../config/sidebar.yml

	modified:   part1/simple_detector.md

src/config/sidebar.yml

@@ -22,10 +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: 'Part 3: Runing the Simulating'
+        #      link: '/part3/simulating_detectors'
+        #    - label: 'Part 4: Sensitive Detectors'
+        #      link: '/part4/sensitive_detector'
 - label: References
   items:
     - label: 'DD4hep Reference Documentation'

src/docs/part1/simple_detector.md

@@ -40,6 +40,8 @@ dd_web_display --export gem_tracker.xml
 Copy the generated file `detector_geometry.root` to your local machine.
 Then open the [web viewer](https://eic.phy.anl.gov/geoviewer/), click on the `...` and open the local root file.
 
+![simple gem tracker](../gem_tracker_part1.png)
+
 Examine the compact description, specifically this part:
 
 ```xml