Wanted to use a third upstream key and since this is greyed out in ME 1, I went to ME 2 to prepare one of the two USK's send it to ME 2 PGM in order to use it as source in the ME 1. I can see the result of keying in the preview rail, but I can't select it somehow. When I press the ME 2 PGM button, it's only visible for a split second.
If this is not the way, what would be an alternative to using a third Upstream Key?
Is it not possible anyway to use the ME 2 Program result as a source in ME 1?
It would be a great help if somebody knows the answer(s).
Thanks in advance.
(Using an ATEM 2 M/E Production Studio K along with a Mac Pro and a Mix-iT)