screen size is to large

System Settings... > Displays and select the Default resolution.

Change your Mac display’s resolution - Apple Support

Hold the Control key on your keyboard and scroll up or down with your mouse or trackpad.

It could be up or down depending on your scroll direction of your mouse or trackpad.

Use the keyboard shortcut of Command + M to change the magnification. If this does not help, please call AppleCare right away.

. Contact Apple Support - Apple Support