Composition in Adobe After Effect
A composition is a framework in Adobe After Effect. All the Compositions have a separate timeline. It includes multiple layers that display video/audio footage items, vector graphics, still images, animated text, and lights. We will add footage to the Composition by generating a layer. We will then arrange the layers inside Composition in composite and space and time using transparency features. It helps determine the parts of underlying layers displayed through the layers stacked on top of Composition.
Creating a composition and manually setting up composition settings
Step 1: Go to the Composition Menu.
Step 2: Click on New Composition/press Ctrl+N to create a new composition.
How to create a composition using a single footage item
Creating a composition from multiple footage items
Step 1: Go to the Project panel and select the footage items.
Step 2: Drag it to the Create A New Composition button at the bottom of the Project panel, OR Click on the File menu → New Comp From Selection.
Step 3: Select any of the form from the Composition setting dialogue box:
Create multiple compositions from multiple footage items
Step 1: Go to the Project panel and select the footage item.
Step 2: Click and drag it to the Create A New Composition box at the bottom of the Project panel, or click on the File menu → click on the New Composition from the drop-down menu.
Step 3: Select Multiple Compositions and other settings in the New Composition From Selection dialog box
Adobe After Effect Timeline panel
Composition in After Effect has its Timeline panel. We can use it to perform several tasks, for example - animating layer properties, setting blending modes and arranging layers in time. The layers available at the bottom of the stacking order inside the Timeline panel will be rendered first. But in the case of 2D image layers, it appears at far-back in the Composition panel and the final composite.
On the left side of the Timeline panel, you can get the columns of controls for layers. On the right side of the Timeline panel, you can see the time graph, and it also contains a time ruler, expressions, markers, keyframes, duration bars for layers (in layer bar mode), and the Graph Editor.
After Effect Composition Settings
Do one of the following to change composition settings:
Advanced settings for compositions
Anchor: Click on the arrow button as shown in the image below to anchor layers asides the corner or edge of the Composition as it can be resized.
Resolution: Preserve resolution when nested and Preserve frame rate when it was nested or is queued in the render queue. Suppose you want to retain a composition's resolution or frame rate but do not want to inherit those Composition settings. Then it would be best if you preserved the frame rate for that Composition when it will be nested. Similarly, the rotoscoping results may look unstable when converted to a different frame rate or resolution. You can use these settings instead of the Posterize Time effect, which is less efficient.
Motion Blur settings in After Effect