We differ between zone/user scenes (0..63) and apartment scenes (64..127). The zone/user scenes are usually called with a group > 0, apartment scenes are usually called in a whole zone or apartment using the broadcast group (=0).
The following list uses the term "zone pushbutton" which means a normal digitalSTROM pushbutton. An "area pushbutton" is a button which controls a subset out of all devices of the same color. With an area pushbutton it is possible to control e.g. a single lamp while the zone pushbutton controls all lamps in a room.
digitalSTROM supports one zone pushbutton and up to four area pushbuttons per color per room.
Please refer to http://developer.digitalstrom.org/Architecture/ds-basics.pdf for the detailed listing of the scene tables.