As the Project Administrator on the project-owning organization, you can customize certain document fields displayed in transmittals.
If you are the project owner, you can create a customized view of transmittal attachments. All users on your project will be able to select these views.
Deleting views does not affect the project mails already sent with the view.
Once a custom view has been set up, a user creating a transmittal will be able to select either the standard view (system default), or any other configured views using the Attachment dropdown.
Once the view is selected, the page will display the new document field configuration, and these fields will appear on the sent transmittal.