 The modulations in this song are unusual for a pop song of the period and present challenges to a singer or improviser, including a semitone modulation that ends each A section (these modulations start with measure 6 in the A and A2 sections and measure 9 of the A3 section), and a striking use of enharmonic substitution at the turnaround of the B section (last two measures of the B Section), where the G melody note over a E major chord turns into an A over the F minor 7 of measure 1 of section A3.Because of its combination of a strong melody and challenging but logical chord structure, "All the Things You Are" has become a popular jazz standard.Its changes have been used for such contrafact tunes as "Bird of Paradise" by Charlie Parker, "Prince Albert" by Kenny Dorham, and "Boston Bernie" by Dexter Gordon.