Although the British edition is still officially titled Yardbirds by authoritative chart sources, such as Official Charts Company,[2] it has since been referred to, first colloquially, then semi-officially, as Roger the Engineer,[3] a title stemming from the cover drawing of the record's audio engineer Roger Cameron by band member Chris Dreja.

The original American versions of this album (issued with a different album cover and titled Over Under Sideways Down after the hit song of the same name) omitted the songs "The Nazz Are Blue" (which was sung by Jeff Beck) and "Rack My Mind" and is mixed differently than the British editions.

Regardless, record collectors have sought out both the mono (LN 24210) and stereo (BN 26210) versions since several tracks are featured with slight differences in the mixes (see US album listing above).

Epic's 1983 reissue (simply titled The Yardbirds) featured the original UK album cover, the two missing tracks, duplication of the British mixing, and two additional tracks: the 1966 single "Happenings Ten Years Time Ago" backed with "Psycho Daisies" which feature Jeff Beck and Jimmy Page on guitar.

In 2021, Demon Records released a "super deluxe" version of Roger the Engineer including the mono and stereo versions on LP and CD with extra tracks and outtakes along with a replica of the "Happenings Ten Years Time Ago"/"Psycho Daises" single.