Additional Comments is a field that is only available at the project level. You can use a field available for all work items (projects, tasks, and milestones) such as description, or you can create a custom field and call it whatever you'd like. For the custom field just go to Settings >> Configure >> select Work Items on the Left >> Create a new custom field >> Make it a text area field. You can then add this field as a column and edit it anywhere in the project.
Comment actions
