To adjust the picture size to fit the TV screen, please do the following:

On the Home  page - Go to Settings on the side menu -OK - Video - OK - Screen position - OK - press up or down to adjust the picture. Usually 95% will fit most TV screens.

Return to the Home page and check to see if it fits. 

If it still doesn't, you may have to check on your TV settings using the TV remote control in the menu options, choose TV zoom in or zoom out.