Making a layer transparent without masking

[Sam230666696c6t]

Not sure what to call it but please help ahaha. So basically I want the black to stay and on the second photo I want the green to be transparent and it wipe off the black. I hope this makes sense. I want to make the green transparent without masking as it would take me a while to do it neatly. Any help on what effects and what not to use would be hugely appreciated.

Sam

[Warren Heaton · Accepted solution]

While the Layer is selected, choose Effects > Keying > Keylight.  Then use the Screen Colour eyedropper to select the green.

It should knock out cleanly.

[Sam230666696c6t]

Thank you good sir you are an icon