Clarified difference by in-place and by reference game objected

docs/en/manuals/building-blocks.md

@@ -86,6 +86,10 @@ The benefit of creating blueprint files becomes apparent when you have multiple
 
 By changing the blueprint file, any instance that uses that file will immediately be updated.
 
+![GO changing blueprint](images/building_blocks/go_change_blueprint.png){srcset="images/building_blocks/[email protected] 2x"}
+
+Here the sprite image of the blueprint file is changed and immediately all instances using the file are updated:
+
 ![GO instances updated](images/building_blocks/go_instance2.png){srcset="images/building_blocks/[email protected] 2x"}
 
 ## Childing game objects