After Effects: Keylight 1.2. Removing the green screen

Using the keylight effect in After Effects:

Select Effect> keylight 1.2.

Drag and drop the keylight 1. 2 effect (highlighted in red on the right) onto the green screen layer

Select eyedropper tool and click on the green screen

Select 'Screen Matte'

Adjust the black and white clips until the black is completely black and the white completely white.