Left Double Barline At The Very Beginning

Okay, so it looks like we have left double barlines in Dorico 6!
However, we still need the ability to put a left double barline at the very beginning of a chart.
It indicates that the beginning of the music is also the beginning of that first section. If there are pick-up notes, then the first measure will have no left barline, and a right double.
It’s a musical form thing. It keeps everything tidy and explicit.

Hi Bilo20, the double barline is exactly what I am looking to achieve. How is did you do it?

The screenshot above is from Finale. But you can get the double barline at rehearsal B using a new option in Dorico v6.0.10.