Comparisons
Redistribution--where an inner part (such as the alto in a hymn) is shared by the two hands--can be considered a modified form of direct fingering. Either hand might use some extension of the hand as it reaches for the notes of the inner part. This technique may be coupled with crossing, substitution, or glissando in order to preserve the legato nature of the inner part.
The main difficulty for some organists is the complication of reading the notes of the left hand in both bass and treble clefs--especially when several verses of text might divide the two staves visually. You can strengthen your ability to use redistribution by practicing the alto line only in places that require redistribution.
In places where the right hand has difficulty executing a legato in both upper parts, try and practice redistribution before requiring the right hand to use crossing, substitution, or glissando.
