He showed it right there. It seemed pretty straightforward and simple to do using his method.

You can also select the instruments to play or mute measure by measure.

I have used a similar method.... I don't know that I split the bar out but I do think I had 2 blue marked bars in a row and muted everything except the drums.

You can find my music at:
www.herbhartley.com
Add nothing that adds nothing to the music.
You can make excuses or you can make progress but not both.

The magic you are looking for is in the work you are avoiding.