Only Hiring Managers and above can send and view e-signature and offer documents. As candidates progress through the hiring process your hiring team may begin to discuss confidential or private information via comments or emails (e.g. salary) that certain members of the hiring team should not see.
Set a Confidential Zone in your hiring pipeline (under the Workflow page) to ensure that these conversations are kept private. When a candidate is in a stage where the Confidential Zone is enabled, emails and comments will default to a more restricted visibility and will be visible only to the person posting them, and those with the same or higher level of access.