A review holds every round in one place. v1, v2, v3 — each with its own markup, permanently.
Putting up a new round
Open the review and press the Upload button in the top bar. The new file becomes the current version and the review goes back to In review.
Old feedback never moves
This is the rule the whole feature is built around: a comment belongs to the version it was written on. Uploading a revision never moves, re-points, or deletes anything already said. Open v1 from the version dropdown and it looks exactly as it did when it was reviewed.
A comment silently relocated onto a layout that no longer contains the thing it complains about is worse than one that is missing, because you cannot tell it went wrong.
When the new round is the same shape
If the revision has the same page count and proportions as the last one, still-open comments are carried across to the same spots — and each one is marked with whether the artwork underneath it actually changed. That answers "what did they actually fix" without opening both side by side.
Comments already resolved are left behind. Nothing is ever auto-resolved for you.
Comparing rounds
The stacked-layers button in the top bar holds the current version against the one before it.
The revision trail
On the project's Design review card, each review shows its rounds as chips — v1 › v2 › v3 — coloured by how each round landed and clickable straight to it. Three rounds, two sent back, the third signed off, readable at a glance.