What are the differences between the PDF request types?

Submission PDF—The Submission PDF type is most suitable for PDF files to be included in submissions to a regulatory authority. Blank forms are also generated.
Archival PDF—The Archival PDF request type is most suitable for PDFs that will represent study contents for archival purposes. Blank forms are also generated by default. Use this request type to create a mid-trial archive or final archive and share the archive with one or more sites. The sites can download their PDFs, examine them, and confirm that they have downloaded and reviewed the PDFs.
Blank Forms Only—This option produces blank forms only (no completed subject forms).
Custom PDF—This option gives you complete control over all settings as well as the ability to share the archive with sites and require confirmation.
Custom Blank Forms—This option produces blank forms only, but allows you complete control over all settings that relate to blank forms.