where did the layout list on the right go?

just finished orchestra score. I want to start preparing the individual parts. Wrote the score with
both" like" instruments on the same line (for example, flutes 1 and 2 on the same staff); then I would create
a new layout and put the flute staff in the original and copy to the new layout; then I can just delete notes of flute
two in the flute one part and so on.

I can’t seem to find the layout list on the right. I am in setup. Under the menu there is next for layout but not new.
I am sure that to get the layout list back is simple but nothing is simple if one doesn’t know the answer.

Can you post a screenshot?

Cmd-9 or Ctrl-9 should bring it back, or find the arrow exactly half way down (which I’ve highlighted green below)