Extract one of the three primary colours from the key-in clip when you have a front clip shot in front of a blue, red, or green screen.

To create a key by extracting a primary colour:

1. In the Keyer, do one of the following:
   • Click Keyer to show the Keyer menu.
   • Click Colour to show the Colour menu.
2. Click Channel.

   The Channel controls appear.

   
   

   (a) Channel Mode box  (b) Softness field  

3. Select one of the primary colour options (Red, Green, Blue) from the Channel Mode box.
4. Enable More to enhance the keying effect.

   The More option extends the range of the colour to be extracted from the key-in clip.

5. Increase or decrease the softness for the key using the Softness field.

   The softness value determines how much of the key-in clip is partially transparent in the matte. Softness creates a smoother transition between the front and back clips in the composite clip.

6. Click Result to see the result of your key.

For floating-point images, you can use a node in Batch or the Modular Keyer to create a 16-bit key by extracting a primary colour. See Keyer-Channel Node.