With our new R-16 we notice the bottom-most part of the viewing area is hidden. Our TV is a flat screen Vizio. If we're watching a show with subtitles, the text disappears below the viewable area. Also, with DirecTV, a prompt appears at the lower right hand corner of the page for "delete" or "keep" but only the "delete" option box can be seen. What do we adjust to bring the entire picture back into view? Thanks.