Setting keyframes on animation layers is nearly the same as regular keyframing. After you have created and selected the current layer, you can keyframe in your scene as usual.
As you manipulate layers in the Animation Layer Editor, some color and font changes show you their status. A layer that is selected is highlighted in light green. A layer that is muted displays dark gray. Similarly, if you solo a layer, other layers are muted and become dark gray. When a layer is locked, its name displays in italics. The layer that receives keyframes is bright green in the Animation Layer editor and is selected in the Key Control’s Layer menu.
To keyframe on animation layers:
The current layer displays bright green and can receive keyframes.
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