1 Enter full-screen mode
Click on the green ‘expand’ icon in the topleft corner. This makes Mail go full-screen. To cancel this, hover your mouse in the top-left corner of the screen and click the icon again.
Click on the green ‘expand’ icon in the topleft corner. This makes Mail go full-screen. To cancel this, hover your mouse in the top-left corner of the screen and click the icon again.