Meant to add, if you are watching analogue (normal TV where you only get channels 1-5) then you have no choice on viewing aspect ratio. The programmes (most of em) are filmed in 16:9, but analogue channels are broadcast in a modified 4:3. You a pair of small, thin black lines top and bottom (to square the picture off for the corners) which is the virtually the same height as a 16:9 picture. But then the sides are cut off the pic for the modified 4:3 - see pic 4 I posted.

I comparred this when we got a digi-box - put on ch5 to watch a 16:9 movie on the digi box on my widescreen TV and then put on ch on my 4:3 TV using normal analogue signal. Same picture, but the sides were lost on the analogue picture....