For the full series see br br The Ultra Key in Première Pro is a way of quickly and efficiently 'GreenBlue Screening' or 'Chroma Keying' footage elements shot against a coloured background. In this second tutorial, Andrew goes on to show how to use the Ultra Key settings and how you can use presets to help understand how certain parameters work. Andrew goes on to show how to deal with edge issues and then how to use another effect to simulate a 'light wrap' effect which brings the colour of the background into the edgealpha channel of the keyed object.