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Crop composition to content resizes the new pre-comp to the bounding box of its visible content and repositions the layers (and the pre-comp layer in the parent comp) so nothing moves visually. No more 1920×1080 pre-comps holding a 200px logo.

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With or without masks

The first dropdown chooses whether a layer’s masks count towards its bounds:
  • with masks: a masked layer is measured by its mask shape, so the crop hugs what’s actually visible.
  • without masks: layers are measured by their full source bounds, ignoring masks.
Masks that can’t define a sensible area (an inverted mask, a first mask set to Subtract, or masks all set to None) are ignored, and the layer falls back to its full bounds.

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At current time or over time

The second dropdown chooses when content is measured:
  • at current time: bounds are taken at the current frame. Fast, and right for static content.
  • over time: every frame of the new comp is sampled, and the crop covers content wherever it moves during the animation.

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Padding

Tick Padding (px) to add breathing room on each side. Top, Right, Bottom, and Left are set independently, in pixels.

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What gets measured

Cameras, lights, 3D model layers, and guide layers never count towards the crop. The rest is configurable in Settings:
  • Ignore Nulls (on by default): null layers don’t affect the crop.
  • Ignore Paragraph Text: measure box text by its rendered text only, instead of including the full text box.
  • Constrain to Parent Composition: clamp the crop to the parent comp’s frame, so off-screen content doesn’t inflate the new comp.
  • Include Shape Extents (experimental): include stroke widths and other rendering extents when measuring shape layers.