Each layer has properties, many of which you can modify and animate. The basic group of properties that every layer has is the Transform group, which includes Position and Opacity properties. When you add certain features to a layer—for example, by adding masks or effects, or by converting the layer to a 3D layer—the layer gains additional properties, collected in property groups.
All layer properties are temporal—they can change the layer over time. Some layer properties, such as Position, are also spatial—they can move the layer across composition space.
You can expand the layer outline to display layer properties and change property values.

Properties in the Effects property group (effect properties) are also layer properties. Many effect properties can also be modified in the Effect Controls panel.
Show or hide properties in the Timeline panel
Select a property or property group in the Timeline panel
To select a property or property group—including
all values, keyframes, and expressions—click the name in the layer
outline in the Timeline panel.
Copy or duplicate a property or property group in the Timeline panel
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