Tap on the chart to bring up the Player control, then the bottom right icon to turn on the Piano/Guitar/Ukulele chords and Chord Scales. 

After you selected the Chord diagram type, tap the bottom right icon again to hide it.

Tap and hold a measure (bar) to see the fingerings/voicing.

 Tap on the chord diagram and swipe it to the left to select a different inversion.