My 2018 NU8000 applies overscan for my Apple TV (not 4K) input when it is named Apple TV (which happened automatically). If I change the input name to PC, overscan is turned off. I cannot seem to find a way to keep the name (and icon and app shortcut) while switching off overscan. Any ideas why this would be the case? Shouldn't this be something I can switch off for each input individually regardless of the input name?
You should be able to overide the 'overscan' feature through the menu of the TV, @Saracen. Go to Home > Settings > Picture > Picture Size > Fit to screen > Toggle on. This should allow you to expand the picture to fit your TV screen.