1. Remember to set the Quantization Options before starting real-time recording.
  2. Unless your recording will contain mostly tuplets, I suggest disabling Detect tuplets.
  3. Once you have recorded you music, select any notes that should be written as tuplets (holding down Ctrl/Cmd to add to the selection).
  4. Go to Edit > Requantize… and choose the relevant settings for your performance (this will include enabling Detect tuplets if you are wishing to requantize those notes as tuplets).
  5. Press OK, and the selected music is requantised using the new settings. You can do this as much as you need across an entire performance in order to achieve the correct notation.