[in menu Modify/Tempo operations as count-in tempo]
This operation adds some drum notes to count in the beats of initial song tempo.
If first song measure contains notes then an empty measure will be added in front of the song, else the drum notes are written into first measure.
Hint: It is important that the meter information of the MIDI file is correct, so that the beginning of the first measure is at start of song (MIDI unit 0). Wrong initial measure position will result in a wrong count-in.