A classmate sent me some lecture notes with bright yellow marks all over the pages, but clicking on them does nothing on my laptop. Is there a simple way to clear these highlights from the PDF?
Honestly, if clicking does nothing you’re probably viewing it in a browser preview, which can’t edit annotations. Try opening the file in a proper desktop reader instead, then click a highlight and hit delete. That’s usually all it takes. Worst case, ask your classmate for a clean copy.