How to change aspect ratio on Panasonic th-50px80u TV

Oct 14, 2021
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The aspect ratio on my tv is messed up (the picture is too big for the screen). Any idea how to fix the aspect ratio? Maybe by factory resetting? I know there's a "zoom adjust" option in picture settings, but it's grayed out, despite being for an HDMI input with a 1080p signal (a Roku). I don't have the remote, but will buy one if absolutely need be. Some picture for reference.
 

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