添加/删除关键帧 add/remove keyframes
在X轴删除放缩关键帧 Delete a Scale Key on
在Z轴删除位置关键帧 Delete a Position Key on
在Y轴删除旋转关键帧 Delete a Rotation Key on
删除全部放缩关键帧 Delete All Scale Keys
删除全部位置关键帧 Delete All Position Keys
删除全部旋转关键帧 Delete All Rotation Keys
在Y轴删除放缩关键帧 Delete a Scale Key on
在X轴删除位置关键帧 Delete a Position Key on
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?
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