1

I am videoing sailing, capturing a race lasting about 45-60 mins. There are often many moments to analyse in detail. How do I analyse many "teachable moments" per video. Am I restricted to just the one sequence? Otherwise, I love it.

2

Yes, you can only have one working zone at any time for now.
I think what people have been doing is to split the video by saving each section into its own file. This may or may not be optimal in your case…
Another thing is to set a key image at the start of each interesting section so you can later jump to it quickly.