diff --git a/03-developer-how-to-for-modules.md b/03-developer-how-to-for-modules.md
index 51b2c0ff9de23b5297b340230e54aa545f800f57..b069b6de524d86d1f8fa539d25eac06105596392 100644
--- a/03-developer-how-to-for-modules.md
+++ b/03-developer-how-to-for-modules.md
@@ -141,7 +141,7 @@ The code organized into the following high level directories:
 
 ### RO Architecture
 
-## ![OpenmanoArchitecture.png](assets/400px-OpenmanoArchitecture.png)
+![OpenmanoArchitecture.png](assets/400px-OpenmanoArchitecture.png)
 
 #### RO Server modules
 
@@ -169,7 +169,7 @@ ACTIONS are a a group of tasks performed against a a concrete instance-scenarios
 
 #### Database content
 
-## TODO
+TODO: add details on DB content
 
 ### Database changes
 
@@ -214,7 +214,7 @@ python -c 'import osm_im; print osm_im.__path__[0]'
 
 It is under openvim repository. RO uses a library for the SDN assist that is in charge of performing the underlay dataplane connectivity using an openflow controller. `osm-openvim` and `lib-osm-openvim` are different, though they share same pieces of code. `lib-osm-openvim` uses a different database name (`mano_vim_db`) so that openvim can be installed in the same virtual machine or container (openvim uses `vim_db` database name)
 
-## TODO complete where RO uses it.
+TODO: complete where RO uses it.
 
 #### Installation
 
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