Open After Effects and go to the Effects & Presets panel.

Keylight 1.2 is an industry-standard chroma keying plugin that has been for over a decade, meaning you likely already have it installed. While some sites may advertise a "download exclusive," the most secure and up-to-date way to access it is through the official Adobe Creative Cloud desktop app as part of your standard After Effects installation. What is Keylight 1.2?

Use the "Screen Matte" dropdown to adjust Clip Black and Clip White , ensuring the background is pure black and the subject is pure white. Tips for "Exclusive" Quality Results

In the Effect Controls panel, use the Eyedropper tool to sample the background color from your footage.

Uses advanced algorithms to distinguish foreground subjects from background screens.

Provides more granular control over color spill than the basic Keylight settings.

Search for "Keylight (1.2)" and drag it onto your green screen layer.