The Tangent CP100 Control Surface > Secondary Colour Grading >

# Creating Keys

Enable the Keyer button and then use the controls in the centre of the control surface to create a key.

To create a key:

1. Enable Keyer in the upper control surface menu, and then enable Keyer in the lower menu.
2. To sample initial softness and tolerance, press F1 on the control surface and then use the left trackball to position the colour picker over the image. Press F1 again to sample the image.
   NoteSampling from the control surface works slightly differently than sampling from the Lustre user interface. When you sample from the control surface, the value and saturation channels are set to the maximum softness. When you sample from the user interface, the value and saturation channels are not set to maximum values.
3. Set the hue, brightness/gain, and saturation levels for the key. Each value is modified according to the original sample—you can adjust the centre tolerance value, as well as the softness and tolerance ranges.
4. Press More (lower left) to shrink, blur, or clean up the edges of the key.

   The Cleanup, Shrink, and Blur controls appear.