Samsung DIRECTV SIR-TS160 - Manual (Page 17)

Chapter 1: Technical overview
If your display is a 4:3 format TV or monitor, your format options include these:
For 4:3 program signals:
For 16:9 program signals:
If your display is a 16:9 format TV or monitor, your format options include these:
For 4:3 program signals:
For 16:9 program signals:
These 2 tables summarize your screen format options:
* Note: Letter box is not available through the composite output jacks (Video
Out, S-Video Out, and TV Out jacks) when the RESOLUTION SELECT
switch is set to 1080i and the source signal is 1080i.
For either of these scenarios, the option you choose is a matter of preference.
The FORMAT button on your remote control allows you to cycle through the
formats available for your display type.
Note: You can set the color of the horizontal or vertical bars displayed for Letter
box and Pillar box screen formats to either black or gray. See Chapter 7 for
details.
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*Letter box Full Zoom
Full
Full
Full
Pillar box Zoom