> ## Documentation Index
> Fetch the complete documentation index at: https://docs.tackstudio.co/llms.txt
> Use this file to discover all available pages before exploring further.

# Cropping

> Fit the new composition to its content.

**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.

## 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.

## 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](/pre-compose-pro/settings-and-shortcuts):

* **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.