Yamaha QY70 Owner's Manual page 42

C Enter a Chord
chord root names "E" through "D#/Eb" marked on the keys, and
the upper octave keys are marked with a variety of chord types.
desired chord root, then the key corresponding to the desired
chord type (the chord type keys alternately select the lower and
upper chord types marked ... watch the display), and finally the
[ENTER] key.
Example: Enter a G7 Chord
40
E a s y A c c o m p a n i m e n t
Note that the lower octave of the micro-keyboard has
To enter a chord, press the key corresponding to the