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Intro to nesting layers and groups in Motion
Groups and layers in the Layers list appear in a hierarchy that shows which layers are nested inside which groups. Nested layers and groups appear underneath and indented to the right of their parent group.
It’s a good idea to group layers that work together as a unit. By nesting related layers you want to animate inside a group, you can save time by animating the enclosing group, instead of animating each layer. For example, when you select a group that has three layers nested in it, the entire group is selected as a single unit.
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Transforming the selected group in the canvas moves all three layers simultaneously.
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Regardless of how they’re nested, layers can always be modified independently. Subordinate groups can also be modified independently. In the following example, a filter is applied to a layer in a group containing three fish layers. All other layers in the group remain unaffected.
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However, If you apply the same filter to the group, all layers in that group are affected by the filter, as if they were a single layer.
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Many filters produce different results when applied to a group, rather than individual layers in a group, as shown in the images below.
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You can also nest groups inside other groups. You might do this if you’re creating a layer hierarchy to control the relationship of one group of layers to another, or if you’re grouping layers to which you want to apply a single set of behaviors and filters.
Note: You cannot group groups that appear at different hierarchical levels in the Layers list.
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