In organisations with Workfront + Proof, a document will typically be added to an issue/task within a project and a proof generated from within Workfront.
We should be able to display information (especially information in custom forms) from Workfront relating to the project, task and/or issue with Proof. Otherwise, every proof reviewer needs a Workfront licence even if their only function is to review and approve artwork. They also need a navigation path, as the notification e-mail from Proof and the proof viewer does not provide any reference back to Workfront.
One approach would be to allow calculated fields in the Proof custom form builder that references the Workfront data model.