Hi, I am about to buy the Notation Composer download. Before I buy it I want to ask one question...when creating your own pieces of music on that specific section, does the program allow you to change the key signature in the middle of the piece, without altering the first half? This question will determine whether or not I will be buying the program. I tried the finale notepad 2010 and it did not allow me to change the key signature. Much help appreciated. Thank You.