I think Peter Gannon's "preview" is his way of saying "plays the chord", so I think he does mean what I also think you mean.
I guess you know that you can play from the selected bar by pressing the "space" bar. That will play the music in context, rather than just the chord, so it is different from what you ask, but it will play all the chords.
hi.
I want to play each chord by myself with shift+enter in bar.