As a teacher, grade an assignment using the grading interface (editpdf) Place at least one of each annotation type on the page (shapes, lines, comments, everything!) Keep the browser console open Now, using the select tool (the arrow): Click each one of the annotations Then click an empty space in the document. Confirm that: In all cases, clicking the empty space deselected the currently selected tool. Clicking an empty space twice or more doesn't result in any problematic behaviour (i.e. you can still select other annotations afterwards) nor any console errors. Confirm that you can click from one annotation directly to another without any problem and that the selection changes from one to another. Select the annotation again Click and drag somewhere on the document, but not on the annotation itself. Confirm that the annotation doesn't move (on stables, this is a bug and the annotation does move when doing this) Now repeat the click and drag, this time starting it whilst over the selected annotation. Confirm that the annotation can be dragged around.