A website in progress can be reviewed the same way as a design — you mark up the page itself rather than a screenshot somebody remembered to take.
Capturing a page
On the project's Design review card, paste the address into …or review a web page and press Capture. Studio takes the page at three widths — desktop, tablet, and mobile — and they become three pages of one review, so responsive problems are visible in the same place as everything else.
The field only appears if page capture is switched on for your workspace. A button that always fails when you press it is worse than one that is not there.
Re-capturing after fixes
Press Re-capture in the top bar to take the same page again as a new version. Because it is the same address at the same three widths, still-open comments carry across to the same spots — and each is marked with whether that part of the page actually changed.
That gives you "re-scan the site and show me what got fixed" as a single button.