This task describes how to customize content
  transformations.
    - 
        Copy the following file:
        
<configRoot>/alfresco/content-services-context.xml
 - Paste this file into the <extension> directory or in your preferred directory.
 - 
        Open the file. Transformers start below the comment:
        
<!-- Content Transformations -->
 - Locate the bean containing a transformer that is most similar to the transformer that you want to add. (It is unlikely that you would want to modify an existing transformer.)
 - Delete every pair of <bean> </bean> tags except the pair containing the similar transformer.
 - Rename and modify the bean.
 - 
        Save the file with a meaningful name.
        
If you save the file in the <extension> directory, the filename must end with ‑context.xml.