Groups in Dorico Elements
A group represents a collection of musicians that are considered together, such as a choir, orchestra, or chamber ensemble.
In a typical project, there might be only one group that contains all of the defined players, but you can define as many groups as required to allow easy separation of forces in larger-scale works. It might also be necessary to assign players to these groups for the purposes of, among other things, properly bracketing and labelling their staves in the conductor's score.
Example
A work for double choir and organ can define the two choirs as separate groups. This allows each choir to have its own label in addition to the labels for each sectional player (soprano, alto, tenor, bass) within the choir.
In a complex work, such as Elliott Carter's A Symphony of Three Orchestras, each of the orchestras can be defined as a separate group.