Modifying this control will update this page automatically

If the picture doesn’t fill the TV screen
If you connected your Mac to a TV and the images don’t fill the TV screen, try turning on Overscan.
Choose Apple menu > System Preferences, click Displays, then click Display.
Click Options, then select Overscan.
For more information, see the Apple Support article Learn about overscan and underscan.
See alsoUse your TV as a display