Personal/private annotations in games, are they possible?

[smurph]

Game reviews - is it possible to add something in commentary box of the moves?

Yea, you can click on [chat] bottom right, it will say “Malkovich”. Then go to analyze, play your variation, enter your descriptive title and click on [share]. If it’s just text, just type it in the ‘Malkoviched’ chat. Observers can see it, your [logged-in] opponent can’t.