Ah... the pulldown arrow/carrot does not appear unless you click on the color format. At first look, It appears that only the check boxes are there and usable only to add the metadata. Now that I know it is a chooseable option, it makes sense.
Thank you.
Upon testing, the alpha channel to a .mov now writes and reads.
Two follow up questions, if I may...
Is there more information available to let the user know if/when the check boxes should or should not be checked – can you recommend an online resource?
What does the ProRes AW or KS terminology represent and where is it from? I have only known HQ or HQX for 422 and XQ or none for 4444.
Again, thanks.
Dario