How would you like the feature to work?
I would like to be able to change the font type, color, size, shadow, location, etc. for the alpha channel.
Why is this feature important to you?
With EW 2009 we use a green background on the Foldback output that allows us to put song words and scripture text on the lower third of our recorded video using chroma keying. This way our in-house worshipers see a typical FOH screen with text over various backgrounds but our recorded video and live stream sees the text over the lower thirds of the pastor, choir, or worship team. I have not found a way to do this with the current version of EW6 and using the Alpha channel would be even better than using chroma keying.