To play the F chord, use the first, second and fifth fingers of your left hand, as shown in the F Major piano chord diagram. The F chord introduces the note A below middle C. When changing between the C and F chords keep your fifth finger in position as this note is common to both chords. When changing between the F and G7 chords keep your second finger in position as this note is common to both chords. Practice changing between C , F and G7 .