There are two ways of fingering seventh chords on your keyboard:
1) Using the single-finger position (Yamaha), or Casio-Chord position (Casio):
The fingering will depend on which brand of keyboard you own. Here is the fingering for the G7 chord of the two most common types of keyboard.
To play a seventh chord on this type of keyboard, press the chord key together with any white key to its left. Any seventh chord can be played like this.
To play a G7 chord on this type of keyboard, press the lowest G key with the fourth finger of your left hand, together with the white key immediately to its left, using your fifth finger.
To play a seventh chord on this type of keyboard, press the chord key together with any two keys to its right. Any seventh chord can be played like this.
To play a G7 chord on this type of keyboard, press the lowest G key with the fourth finger of your left hand, together with two white keys to its right, using your third and second fingers.
If you have another brand of keyboard, check in your owner’s manual to see which fingering should be used.
2) Using fingered chords (suitable for all types of keyboards).
The fingered G7 chord is the same for all types of keyboards. To play the G7 fingered chord, use the first, third and fifth fingers of your left hand.
The next three songs all contain a G7 chord. Look for easy ways to change between chords.
When changing between the C and G7 fingered chords keep your fifth finger on the G key. When changing between the F and G7 fingered chords, keep your thumb on the F key.
When changing between the G and G7 fingered chords keep your fifth finger on the G key and your third finger on the B key.