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