I am also a bit confused about terminology. There is the orientation shown in the pictures, which is like a book in a bookcase. In this orientation, it is sitting with one edge with vents, which is not completely blocked, since the rubber rim is raised a bit (maybe 2mm). Then there is flat-like-a-book-on-a-table orientation, with all three vented edges exposed, along with the lighted logo on the fourth side opposite the side with the connectors. I think the question is whether this latter orientation is OK, from a ventilation perspective, even though the illustrations use the former orientation.