View Non-Linear Animation
Non-Linear Animation (NLA) is similar in concept to non-linear editing, where you can work at any point on a timeline, with layers containing shot elements thatn can be blended, mixed, faded and so on.
NLA allows individual animation segments, so-called Motion Clips, to be blended in various ways. These Clips can be faded in or out, be looped any number of times, moved and scaled temporally and modified via curves. This can be done with individual objects or with an entire object hierarchy, e.g. a character’s Joint hierarchy or the Constraint objects that control the character.