Google Drive is Google's file sync app that lets you store all of your files online alongside your Google Docs documents, and keep them synced with all of your devices.
Return rejected PDF drafts to their makers with the review reason.
Your makers get a rework task with the reviewed PDF and rejection reason, so the next revision starts from the right file.
Mark doubtful passages in Markdown for editorial review.
Get Markdown from PDFs in your knowledge-base folder, with questionable pages called out for your editor to review.
Preserve publication proof decisions with the reviewed upload.
Keep a clear history of who approved or rejected each campaign proof, even when the review board status changes later.