modified: part1/simple_detector.md

	modified:   ../../static/example_cell_size.png

src/docs/part1/simple_detector.md

@@ -54,10 +54,22 @@ ddsim  --runType run  --enableG4GPS \
 This will run geant4 using the General Particle Source (GPS) tool.
 The output will be a root file containing the generated events and GEM tracker hits.
 
+See the [GPS Documentation](http://www.fe.infn.it/u/paterno/Geant4_tutorial/slides_further/GPS/GPS.pdf) for more information.
+
+
 ## Digitization 
 
 ```bash
 root -b -q example_digi.cxx+
 ```
-![digi histogram](example_digi.png)
+![digi histogram](../example_digi.png)
+
+## Channel/Cell Size
+
+```bash
+root -b -q example_cell_size.cxx+
+    
+```
+![cell size histogram](../example_cell_size.png)
+