Grader View As a teacher, open grading interface Add a comment and stamp and a square or line Open and close the grader panel (bottom right icons) and notice the stamp and comment annotations move with the document, just like the square does. I.e. their position relative to the text doesn't change. Test in Clean and Boost themes! Testing the annotated PDF As a teacher, annotate using one stamp, one comment and one square. Save changes. Now, as the student, check the assignment and click 'View annotated pdf' Observe that when scrolling, the stamp and comments don't move outside of (above) the dialog. Test in Clean and Boost themes! Testing the Grader view in more detail: As a teacher, go to the grader. Use the stamp and comment annotations and confirm you can place these in the same places you can on stable branches. Test edge cases and change tools, etc. Try your best to see any problems with placement. If you're satisfied this mimics stables, then we're happy here. Confirm you can add comments and stamps using a tablet/phone interface. Make sure that comments appear in the same place you had them after you save the page.