Flaps 1 - The Slats extend to Midrange Position (approx 15 degrees) Flaps stay retracted.
Flaps 5, 15 and 20 - Slats stay in the midrange position and flaps move to commanded position
Flaps 25 - Slats extend fully and flaps move to 25 degrees.
Flaps 30 - Flaps extend to 30 degrees.