I dunno, maybe I'm not so dumb. Even after changing the aspect ratio output (repeatedly), the picture is still in the center of the screen. Actually, in order for the Hi Def 4:3 picture to fill the screen, it would have to zoom, (which would cut off the sides of a widescreen movie, focusing on the center) and my TV doesn't do that.
Standard Def DVDs in 4:3 fill the screen when played on the BD player - always have. 4:3 fills and 16:9 is letterboxed. However Blu-Ray discs letterbox everything
on the CRT set, so Blu-Ray Trek is letter and
piller boxed. I hope I'm explaining myself adequately, I'm bad at this...