In the RB Notation window, while in Edit mode, if you click a note and drag it up or down, it auditions the note through the synth so you can hear the new pitch that will be set when you release the mouse button.

Then, when you release the mouse button, it plays the note again (I guess in case you weren't paying attention??).

It would be useful to have an option (in Prefs?) so that when you release the mouse button, it does NOT play the note again.

The option in Prefs should be called "Am Paying Attention - yes/no".