When somebody is playing a piano they occasionaly increase or decrease the distance between their fingers so to reach farthest notes or closest ones. What are these two finger positions and actions called?
Clarification: when the fingers are very close to each other you can play notes that are byside each other. When the fingers are far from each other (depending on the hand) you can play notes that have a larger interval than a second.
Edit: I've noticed "gather" being used to get the fingers closer and "stretch" to get them further from each other. Would that be correct?