Whenever a comment is added, Rethink Workflow will send out an email as in below:
Rethink Workflow allows administrator to decide if a particular user can make comment or not via permissions while designing the workflow.
How to design
To allow end-user to add comments on a document, the workflow designer can select "COMMENT" option on each field when setting up the field permissions.
If an end-user can add comments on any field according to permissions, that user can add comments for the entire document too.
How to add comments on a document
Add comments for the entire document
Follow the steps demonstrated in the following video to add comments for the entire document:
Add comments for a particular field
On a particular field, click on the corresponding "COMMENTS" button to see the comment panel. On this panel, write the comments and click on Send button as usual.