The PlayMap is the first screen you should see after starting the application.
Closing the PlayMap will close the application.
The top part of the PlayMap contains the menu, command buttons, and various options.
The main panel below this shows the chord notes, spread across a keyboard. The keyboard can be configured to be 1 - 4 octaves long
Resizing the PlayMap window horizontally does not change the number of octaves displayed, but can be used to match the scale of a real midi keyboard.
You can also resize the PlayMap window vertically. This will allow more or less chords to be displayed. The bottom line of chords represent the current position, with lines above representing later chords.
The bottom panel shows the current major or minor key scale notes.
The left-hand panel show bar numbers, and the right-hand panel shows chord names.
The chord notes are updated as a MidiFile (or AudioFile) is played. Each time a beat is reached, the notes move down.