Request to add ability to save conditional premoves in correspondence

Hello. I'd like to request the ability to save conditional premoves in correspondence games. There are times when I would like to review lines and then come back to review them later (before actually selecting a line to play).

Thank you.

Related question: is there a way to copy and paste lines from either the move list or the analysis board to private notes? This would provide a relatively easy way to save lines and review later.