MIDI: The MIDI window lets you import MIDI files to be played together with the song. It´s very useful for having the song melody been played together with the guitar.
You can also import other instruments like drums and bass, making the song sounds like a complete band.
To start, just click on Add Track. Then choose the .mid file and click on Open. Then the software will show all the MIDI tracks included on the file. Select the ones that you want to import and click on OK.
The imported tracks will appear on the Track List. You can set the Track Name, starting instant and also the volume for each one of them.