Adjusting the screen size on your LG television requires you to access the "Aspect Ratio" menu. Here you can choose between a 16:9 aspect ratio, which is more of a rectangular shape, or the 4:3 aspect ratio, which is closer to a square box. Adjusting the screen size takes no special expertise and requires only a few moments of your time.
Press the "Menu" button on the remote control.
Press the down arrow until you reach the "Picture" category and press "Enter."
Select "Aspect Ratio" and press "Enter."
Press the down or up arrow to select either "16:9" or 4:3." Press "Enter."