Picture size/Screen format/Wide mode changes automatically.

Select within the text to jump to the related settings screen.

You can adjust the picture size from [Screen].

Press the (Quick Settings) button on the remote control, then select [Settings] — [Display & Sound] — [Screen].

Example of setting [Wide mode] (when the aspect ratio of the original picture is 4:3)

[Auto]
When changing the channel or video input, if [Auto] in [Wide mode] is selected, the current [Wide mode] setting is automatically changed according to the input signal. To lock the [Wide mode] setting, choose other than [Auto] in [Wide mode].
[Wide zoom]
Enlarges the picture, preserving the original picture as much as possible.
[Normal]
Displays the original picture as is. Sidebars that fill in the difference with the 4:3 picture are displayed on the left and right sides of the screen.
[Full]
Enlarges the picture (with overscan) fit to panel, without preserving the original aspect ratio.
[Full pixel]
Enlarges the picture (without overscan) fit to panel, without preserving the original aspect ratio.
[Zoom]
Displays a 16:9 picture that has been converted into 4:3 letter box format, in the correct aspect ratio.
[14:9]
Displays a 14:9 picture in its original size. Sidebars are shown to fill the 16:9 screen.

The picture may not be displayed as intended even if it has an aspect ratio of 16:9. Change the settings to switch to the desired display.

[Auto]
When changing the channel or video input, if [Auto] in [Wide mode] is selected, the current [Wide mode] setting is automatically changed according to the input signal. To lock the [Wide mode] setting, choose other than [Auto] in [Wide mode].
[Wide zoom]
Enlarges the picture, preserving the original picture as much as possible.
[Normal]
Displays a 4:3 picture that was expanded horizontally into 16:9, in the correct aspect ratio.
[Full]
Enlarges the picture (with overscan) fit to panel, without preserving the original aspect ratio.
[Full pixel]
Enlarges the picture (without overscan) fit to panel, without preserving the original aspect ratio.
[Zoom]
Displays a 16:9 picture that has been converted into 4:3 letter box format, in the correct aspect ratio.
[14:9]
Displays a 14:9 picture in its original size. Sidebars are shown to fill the 16:9 screen.

[Auto] in [Wide mode] will not expand the picture while the content switches since the content information is regulated by the channel signal provider. You can manually change the [Wide mode] setting if desired, which will remain in effect until you change the channel/input or manually change the [Wide mode] setting again.
The Picture size depends on the signal content.
- The picture becomes smaller during commercials due to the method used by the provider to broadcast content. When HD content channels switch to SD content (commercials), the picture may become small with a black border.
- Some wide screen programs are filmed in aspect ratios that are greater than 16:9 (this is especially common with theatrical releases). Your TV will show these programs with black bands at the top and bottom of the screen. For more details, check the documentation that came with your BD/DVD (or contact your program provider).
- Programs broadcast in HD formats (720p and 1080i) with 4:3 content will commonly have black bands on the left and right sides of the screen which are added by the broadcaster.

Some cable and satellite set-top boxes can also control the size of the picture. If you are using a set-top box, refer to the manufacturer of the set-top box for more information.