I rotated it 90 degrees, and it is perfect in the preview window.
I produce the video to a new mp4 file.
When I play the result, the image is back to the original orientation (so it is, once again, sideways).
If I re-open the project in PD, it displays in my desired (vertical) orientation.
But, when I play the produced mp4, it is horizontal.
How can I get the mp4 to be the same as the preview window in PD?
Thank you.
DG