An example method involves providing an interface that simultaneously displays an indication of a respective volume corresponding to each of at least two zone players and displays a respective selectable icon corresponding to each of the at least two zone players. Each respective selectable icon indicates whether the corresponding zone player has been selected for a group, and at least one of the respective selectable icons indicates that a respective zone player has been selected for the group. The interface further displays an indication of a group volume associated with the at least one selected zone player. The method further includes receiving a command to change at least one of a respective volume of one or more of the at least one selected zone player or the group volume, and transmitting an indication of the received command to one or more of the at least one selected zone player.