Apparently there's a major problem in assignment activity, that occurs when student uploads his submission in different screen orientation.

If student uploads his submission in vertical orientation, and the image requires the teacher to rotate it in the assignment grader this is where it all gets messy.

Of course the image will rotate in the assignment grader and allow teacher to put annotation on it, but when it comes to saving the output PDF file the image with all the annotations will still be saved in vertical position, with all the annotations and image being cut in half, and not printed properly.