[1] The basic musical and lyrical structure of "Changes" was written by Yes guitarist Trevor Rabin, prior to his joining the band.
[2] Once Rabin joined the band, additional music and lyrics were contributed by singer Jon Anderson and drummer Alan White for the version that would appear on 90125.
White contributed the shifting minimalistic rhythmic figures and melodies used for the introduction, while Anderson adapted lyrics and parts of the melody (including the chorus and the addition of the "one word from you, one word from me" section of the bridge).
After Rabin's departure from the band, the song was permanently dropped from their setlist.
It would not be played live again until 2016 when Rabin joined vocalist Jon Anderson and keyboardist Rick Wakeman in forming Yes Featuring Jon Anderson, Trevor Rabin, Rick Wakeman.