After creating the key and adjusting the luminance, you can modify the edges of the key by blurring the key-in clip or the edge of the matte, applying filters to the edge of the matte, or inverting and then adjusting the matte. You can also suppress colour spill and blend the front and back clip.

To refine a key created from the Master Keyer menu, see the pertinent sections in Creating and Refining a Key.