Each property has a channel which it is recorded to, for example,
Cube.location.x is recorded to Channel X Location.
The X location and Y location properties can be shared across multiple objects,
if all objects have X location and Y location properties beneath them.
当您第一次通过添加关键帧动画化一个物体时，Blender为该数据创建一个 动作 来记录这些数据。
如果要为同一对象创建多个动作，请按每个动作的屏蔽按钮。 这将使动作成为 伪用户 并使Blender保存未链接的动作。
物体在同一时间只能编辑一个动作数据块。 NLA编辑器 用于将多个动作数据混合在一起。
Specifies if the manual frame range should be used, and the frame values.
When the range is set, it is used instead of the actual range occupied by key frames when adding a new track based on the action to NLA. It can also be used by exporters to determine the range of frames to export.
The range is displayed in the background of the editor as diagonal hash fill, to distinguish it from the solid fill of the current playback range.
The frame values are most commonly expected to be integers, but can be fractional.
- Cyclic Animation
Specifies that the action is intended to be cyclic over the specified range. The first and last frames of the range should represent the same pose of the cycle one loop apart, i.e. the range should include the duplicated initial key of the loop.
This option signifies intent and does not make the action cycle on its own. However, if Cycle-Aware Keying is enabled, it will automatically enable cyclic extrapolation and set up the loop period for curves newly added to the action.