Picture size is off center

Sounds like you have it on zoom setting. Go to the picture menu and scroll through the options. Start with 16:9 and try others if this doesn't work. If you've already tried this, you may have to go into screen setting and manually draw the picture in horizontally and vertically - but make sure you've got it on 16:9 and paused on a typical picture before you mess around with these settings.

I found the user manual online, and the pictures in it are really helpful and make this make a lot more sense, but:
1. Press [SCREEN MODE], to switch the TV aspect ratio.
2. Press [SCREEN MODE] repeatedly until the normal screen displays.
NOTE: • Some programs may not offer all display mode options.
4:3 Programming
[Sidebar] Sidebar displays a 4:3 picture at its standard 4:3 size. Sidebars will be displayed on the right and left edges of the screen.
[Full] Full displays a 4:3 picture at a 16:9 size, with horizontal elongation necessary to fill the screen.
[Cinema] Cinema displays a 4:3 picture at a 16:9 size, with less horizontal elongation necessary to fill the screen because a little bit of the top and bottom edge of the screen will be cut off.
[Wide] Wide displays the center of the picture as original size and the outer sides of the picture will be elongated. The size of the picture will depend on the original signal.
16:9 Programming
[Full] A picture is displayed at 16:9 size as it is.
[Zoom] Zoom displays a 16:9 picture without changing its horizontal and vertical ratio, at its maximum size.
[Cinema] Cinema displays a 16:9 picture with vertical elongation.
[Expand] Expand displays a 16:9 picture with horizontal elongation

Source: LC320EM8 User Manual
http://www.manualslib.com/manual/47021/Emerson-Lc320em8.html?page=21#manual

On the remote control there is a zoom button. Your picture is zoomed in x2. You need to set it to normal.

Hello
You can set the picture size by remote control itself.

You can vide 480i format programmes in three picture sizes. 4:3, 16:9, and ZOOM
You can change the picture size by pressing the PICTURE SIZE button on the remote control.
4:3 Picutre size
To fill the screen, the top and bottom edges are extedted more widely, although the center of the picture remains near the former ratio.
If receiving a 4:3 programme, the image size is displayed in its originally formatted proportion.
16:9 picure size
This image displays the size of standard 16:9 with black bars at the top and bottom.
If receiving a 4:3 programme, the image is displayed with black bars at the top and bottom and stretched wider.

NOTE: If a fixed bar remains on the screen for a long period of time, the image can become parmanantly engrained in the screen and cause subtle but permanent ghost images. Never leave your TV for long periods of time while it is displaying these images.

Zoom picture size [for 16:9 formats]
The entire picture is uniformly enlarged --it is stretched the same amount both wider and taller (retains its original proportion). The right and left edges of the picture may be hidden.
OK.

It's not your tv. It's your cable box setting. Go into settings on your cable remote and set picture size to normal and not zoom or any other setting. Also make sure your picture format is set to 16:9 on your tv. If you cannot figure how to change picture size on your cable box, contact your cable provider. Good Luck.

On your remote control you should see a zoom or picture size button. Try changing this back to 16:9. I expect that your screen got zoomed either on purpose or by accident by someone. Some people zoom in the picture to eliminate the aspect ratio areas at the top and bottom and/or sides.

This should be your problem, just un-zoom the picture

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The aspect ratio (zoom) button on the cable remote had been changed. On Brighthouse the # button toggles through the zoom settings. It's not a tv issue, it's a cable fix.

take zoom offf on dish and the tv it sel use normal 16 .9 ,mode when u push screen in to it use 1024x768 60 hertz ok

there are only normally 4 options for picture size, 4:3, 16:9, 16:9 zoom and auto, unless you are using High definition. Any other settings should be found in your cable reciever box as the picture size can be altered in its settings also.