Users with Read or Write access to a document can leave comments on the document details page if the Discussions functionality is enabled for the template that was used to create the Document (see Enabling discussions for a template).
To add a comment:
Select the required document.
Select
Discussions
tab on the document details page.
Click
Add comment
button.
Enter new comment and click
Add
.
To edit an existing comment, click and to delete a comment, click .
You can expand and collapse a comment by clicking on the comment title.
note
If
Discussions
option is not available on the document details page, check whether