I do not know how I zoomed the image and I cannot get it back to normal. My remote does not have a zoom option.
you can check the settings in the X1 equipment to see if zoom is on but note it will not affect HD channels. Press the Xfinity button on the remote > gear(settings) > device settings > Video Display > zoom (hit OK to toggle between full and none). You may find that the zoom is actually your TV's zoom function. to fix that you will need your TV's remote and press menu and search for the zoom setting if there is not a dedicated button on the TV's remote.