Do you ever wonder why we ask for images to have the devices horizontal? Could you image you had to identify someone down at the police station. But they had the guy upside down, or laying down horizontally. Do you think you could identify him/her? Thus when we see the images with the devices horizontal, then we know exactly what we are looking at. Thus why we keep asking to have them with the devices or coins horizontal. It is the most familiar position for us to see them.