Unfortunately, when viewing the images in full size, you're just viewing the image by itself - there is no HTML markup associated with the page that I can control. Even if I could, hosting such large image files is extremely expensive for me (images from my most recent post consumed about 200GB of bandwidth yesterday alone), and I'd prefer not to make it easy for people to click their way through the largest versions of the file. Instead, I'd rather visitors browse the medium-sized copies, and then only load the larger files if they really want to see it at full resolution.