modified: overview.md

	modified:   ../../static/DD4hep_block_diagram.svg
	new file:   ../../static/DD4hep_block_diagram2.svg
	new file:   ../../static/dd4hep_DetElement.png

src/docs/overview.md

@@ -8,7 +8,9 @@ DD4hep introduces the concept of a `DetElement` which is related to the volumes
 These elements build up a separate tree which describes the relationship between the volumes and the readout detectors. 
 Through the unique BitField ID this allows position space information to be mapped to and from channel number/cell ID space.
 
-![DetElement](DD4hep_block_diagram.svg)
+![DetElement](dd4hep_DetElement.png)
+
+![dd4hep](DD4hep_block_diagram.svg)
 
 ## EIC Data model