Can I undo one page of a change and keep the rest?

From the change

1. Open Plan & changes → Changes and open a change that is Live.
2. Under Pages and images in this change, press Undo next to the page, image or redirect.
3. Confirm. That item goes back to how it was before the change. The rest stays.

If you undo the last item that is left, the whole change is rolled back.

From the page

Open Website health → Pages, open the page, go to History and press Undo on this page.

Which changes can be undone one item at a time

Titles and descriptions, structured data, image alt text, internal links, page text, new pages and posts, publishing pages, redirects (one redirect at a time) and images made smaller by Speed fixes.

Other kinds, such as speed settings, accessibility fixes, sharing tags and footer links, are undone as a whole with Roll back.

It depends on your connector

Undoing one item needs a connector that can do it for that kind of change. If yours cannot, the change says why, for example that a newer version of your connector is needed. Update the connector, or roll back the whole change.

You need a role that can publish changes: owner, admin or SEO manager.