I think I have the same issue. I used to be able to rotate pages in Zotero (as of a week or two ago, I think), and now I cannot. I'm also on an M1 Mac.
No, nothing to do with the other thread. I've moved this to a new thread.
You can rotate pages from the thumbnails tab of the sidebar of the PDF reader. We removed the option in the View menu, which just rotated images temporarily while viewing, now that there's an option to rotate pages in the PDF properly.
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You can rotate pages from the thumbnails tab of the sidebar of the PDF reader. We removed the option in the View menu, which just rotated images temporarily while viewing, now that there's an option to rotate pages in the PDF properly.