When viewing a DVD movie, I noticed that even with Full Screen selected, there are black borders at the top and bottom of my display. Shouldn't the entire screen be filled with the movie image when Full Screen is selected?

The aspect ratio is defined as the relationship of screen width to screen height. The majority of computer monitors and televisions have an aspect ratio of 4:3.

If you play a 16:9 DVD movie on a 4:3 display, there will be a black border at the top and bottom of the screen even if play "Full Screen" is selected. This is normal and no cause for alarm as the movie has been recorded to show the full width image just as if you were in a movie theater. Selecting Full Screen will have no impact on a 16:9 aspect movie because it is using all the screen it can. You would notice the same effect on a television screen when playing a 16:9 format DVD movie.

To get true full screen playback capability, the DVD movie must be recorded to the disc in a 4:3 aspect ratio, or you may view the movie on a computer monitor with a 16:9 aspect ratio. The Apple Cinema Display is very close with an 8:5 ratio. In this case of a 4:3 ratio screen, selecting Full Screen will fill the display screen with the movie image. Check the DVD packaging to verify what aspect ratios are present on the disc.