How to use the timeline in After Effects

The timeline is where your animation comes to life. It’s the control center for every layer and keyframe you create.

Steps to use the timeline

At the bottom of After Effects, you’ll see the timeline. Each layer shows up as a horizontal bar — that bar represents how long the layer lasts in your composition.

After Effects Timeline panel showing layers and time ruler

Move the playhead (the blue vertical line) left or right to scrub through your project and preview what’s happening. Drag the ends of a layer bar to trim it shorter or extend it longer.

After Effects Timeline panel with layer start drag

To see a layer’s transform properties (Position, Scale, Rotation, Opacity), just hit P, S, R, or T on your keyboard — each letter reveals one property.

Layer controls and switches visible in the After Effects Timeline panel

Click the stopwatch icon next to any property to create a keyframe.

Timeline in After Effects with keyframes added to a layer

Move the playhead, change the value, and After Effects automatically creates another keyframe. The animation happens between those two points.

Timeline in After Effects with animation added to a layer

One more thing

Press U on your keyboard to reveal all the keyframes on a selected layer — super handy when you’re working on complex animations and need to see everything at once.

Related how-tos

How to zoom and navigate the timeline in After Effects
How to create precomps in After Effects
How to use easing for smooth animation in After Effects

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