1. Create the 720 sequence. (Yours is 1080)
2. Add 1080 clips to it.
It really is that simple. The black you see is just the actual bottom edge of the clip.
I thought I had done that under sequence settings. ? Not changable after footage is in a timeline?
What you have circled in your first image is your Preview File format.
Changing that will not change your Sequence settings.
As Jim sez, you need to create a new 720 Sequence.
Not changable after footage is in a timeline?
Not changeable after creating it, footage or not.
Thank you Gentlemen. Get used to AE and the lateral over there and come back here and not quite the same. Like Cntrl K does nothing here. LOL!
However, you can copy and paste your clips into a new 720 sequence and achieve the same thing, no?