You can add your own comments to the user-defined attibutes in the Template Editor attribute tree.

1. Open your copy of the contentattributes_userdefined.lst file.
   

   For example, MY_contentattributes_userdefined.lst. Do not modify the original contentattributes_userdefined.lst file.

2. Scroll down to the list of attributes assigned to content types.
   
3. Add your comment inside quotation marks, after the attribute name.

   For example:

   

4. Save the changes.
   

   The comment you added is displayed in the attribute tree in Template Editor: