Precomposing in Adobe After Effects allows you to group and organize layers in your composition. It can be useful for keeping your project organized while working with complex compositions.
To precompose layers, follow these steps:
- Select the layers you want to include in the precomp. You can select multiple layers by holding the Command or Ctrl key and clicking on each layer.
- Right-click on one of the selected layers and choose “Pre-compose…” from the menu.
- In the Pre-compose dialog box, name the new composition and specify how the layers should be organized. You can choose to leave the layers in place or move them into the new composition.
- Click “OK” to create the precomp.
Keep in mind that precomposing can nest compositions within compositions, making it easier to work with complex projects but potentially more difficult to make changes to individual layers.
Precomposing will also apply effects to the entire precomp, retain keyframes and expressions, and allow for the creation of reusable elements.