Samsung PN51E6500EFXZA - Manual (Page 62)

Changing the Picture Size
Screen Adjustment
Menu
→
Picture
→
Screen Adjustment
Using this function, you can select
various picture size and aspect ratio
options.
●
Picture Size
If you have a cable box or satellite
receiver, it may have its own set of
screen sizes as well. However, we
highly recommend you use your TV's