Suppose I open 1NT. This defines my hand within narrow limits (typically 15-17 high card points and "balanced" distribution), causing my partner, who now knows a lot about my hand, to become 'captain" of the team and having the right to place the contract going forward.
Partner may bid 3NT. That's game, and basically the end of the story. But suppose partner raises to 2NT. Do I now have the liberty to bid three or four of say, a five card suit, or is partner's preference for a NT contract final (giving me only the options of pass or 3NT)?
Partner may bid a Jacoby transfer (two diamonds asking me to transfer to 2 hearts, or two hearts transferring to two spades, etc.). Partner is clearly in charge here, and I must comply.
Partner may bid two clubs (Stayman). I bid two of one major (showing four cards in that suit), and one partner bid three of that major. She said that she was offering me the choice of passing, going to four of the major or bidding 3NT. Was she, in fact, relinquishing the captaincy, and are there any (other) post-1NT sequence where the responder does this?