"The top two center stacked boxes are labeled Current Show and Current Song. These indicate what you are about to perform. When Sinfonia is first launched (see 'Logging On'), it will automatically load the first song (i.e., 01-Overture). Notice that the first song in the Song List is highlighted. The highlight is another indicator of the current song. You may begin playing this song by pressing 'GO' on the MIDI Keyboard; Sinfonia will play the song at the pre-programmed tempo as defined in the score. [Of course, what sets Sinfonia apart from pre-recorded music is its unique ability to follow a conductor or singer, acting like any other instrument in the pit, except sounding like many instruments playing at one time.]The Up and Down arrow keys on the typewriter keyboard allow you to select other songs. If you are already in play mode (the current song has not ended), the arrow keys will also act as a stop button. If the current song ends, you will either need to arrow to another song (probably the next song in the show) or go to an earlier spot in the current song to continue playing (see 'Song Navigation'). "