How to Scale a Layer While Keeping Its Proportions in After Effects

Introduction

When scaling a layer in After Effects, it’s important to maintain its original proportions. If the width and height are scaled independently, the layer becomes stretched or distorted. Fortunately, After Effects provides simple tools to scale uniformly while keeping dimensions locked.

In this tutorial, you’ll learn the safest and most efficient methods to scale a layer proportionally.

Method 1: Use Uniform Scale (Default Behavior)

By default, After Effects scales layers proportionally when dimensions are linked.

Step 1: Select the Layer

Click the layer you want to scale in the Timeline panel.

Step 2: Reveal the Scale Property

Press S on your keyboard to open the Scale property. You will see two values (for 2D layers):

X (Width)

Y (Height)

For 3D layers, you’ll see:

X

Y

Z

Step 3: Make Sure the Constrain Proportions Icon Is Enabled

Next to the Scale values, you’ll see a small chain link icon. If the chain icon is enabled (linked), the scale values are locked together. Changing one value automatically adjusts the others proportionally.

If it’s disabled:

Click the chain icon to re-enable proportional scaling.
Now you can change one value (for example, from 100% to 150%), and the layer will scale evenly.

Method 2: Scale Using the Selection Tool (Maintain Proportions in the Viewer)

You can also scale directly in the Composition panel.

Step 1: Select the Layer

Make sure the layer is selected.

Step 2: Use Corner Handles

Drag one of the corner handles of the bounding box. To maintain proportions:

Hold Shift while dragging.

This ensures the layer scales uniformly without distortion.

Method 3: Scale From the Center

Sometimes you want to scale proportionally from the center instead of an edge.

Step 1: Select the Layer

Click the layer in the timeline.

Step 2: Hold Modifier Keys While Dragging

Hold Shift + Alt (Windows)
Hold Shift + Option (Mac)

Then drag a corner handle.

This will:

Maintain proportions
Scale from the center of the layer

Important: Check Pixel Aspect Ratio

If your layer still looks distorted, verify:

The composition’s Pixel Aspect Ratio

The source file’s aspect ratio

Go to:

Composition → Composition Settings

Make sure Pixel Aspect Ratio is set correctly (usually Square Pixels for most modern projects).

Preview the Result

Scrub the timeline or preview the animation to confirm:

The layer scales smoothly
No stretching or distortion occurs
Proportions remain consistent

Conclusion

To scale a layer while keeping its dimensions correct in After Effects:

Keep the Scale values linked
Use Shift while dragging in the Composition panel
Use Shift + Alt / Option to scale from the center

Mastering proportional scaling ensures your designs remain clean, professional, and distortion-free in any project.