这些层可以被动态的增加或删除，你也可以对这些层进行改动，因为每层都有一个轨道，你可以在轨道中的特定时间点加入关键帧到达改变动画的目的。
These layers and be added or removed dynamically and you can change each layer as it has a track that lets you change it as a function of time by inserting keys at certain frames in the track.
它也会在相机创建的地方放置一个关键帧，这样你就可以准确地删除、移动相机位置，创建一个你想要的新关键帧。
It will also place a keyframe where the camera was created which you can delete, move the camera exactly in position and then create a new keyframe as desired.
我是否应该清理曲线并删除不必要的关键帧？
Should I BeCleaning Up Curves and Deleting Unnecessary Keys?
点击删除按钮将删除只有当前的关键帧。
Clicking the remove key button will remove only the current keyframe.
点击删除按钮将删除只有当前的关键帧。
Clicking the remove key button will remove only the current keyframe.
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