Can I annotate text in multiple tabs?

It is possible to open the same assignment in multiple tabs. However, the extensive functionalities of the pdf viewer (annotations, comments, etc.) only work within one tab. You can open the assignment in one tab, annotate and add comments and navigate by clicking in the “Panel“ view in the upper left-hand corner. You can then navigate either via “Thumbnails” view or via the “Outlines” view (if available in the assignment).