Green Screening/Colour Keying

I also trialled green screening/colour keying. To do this on adobe after effects these are the notes I made on how to do it;
- NOT project, new composition
-Drag media to area at top
-Click the cirlcle with the arrow on toolbar at top, rotate and make sure you're on composition NOT layer
- Effects - keying - Key light 1.2 - select the colour to get rid of (click on pipette at side on screen colour)
- Final result - screen matte
- On left- push black and white up/down
- Screen shrink/grow- minus number to improve edges