Stemming from the need for: (1) The ability to hide certain versions of a proof from "External approvers" (2) The ability to hide annotations from "External approvers" It's very common to have multiple internal revisions before sending work for a client or external approver to review. While internal revisions happen often at the start of work on a job, they can happen at any point even after a client's initial review. These internal versions often include changes, work-in-progress, annotations, and context that is undesirable for an external approver to see.