LCD TV and DVD question?

G.O.A.T.

New member
I am new to having an LCD. I have a Samsung 40" LCD 120HZ 1080p and now some questions:

1. Why when I play a DVD does the screen have about 4-5 inches of "black" on the top and bottom of the screen? Is this normal? The dvds I am watching are not widescreen dvds.

Is there a way to switch between 60hz and 120 hz?

THanks!
 
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