---
title: kCGPDFContextTrimBox
framework: coregraphics
role: symbol
role_heading: Global Variable
path: coregraphics/kcgpdfcontexttrimbox
---

# kCGPDFContextTrimBox

The trim box for the document or for a given page.

## Declaration

```swift
let kCGPDFContextTrimBox: CFString
```

## Discussion

Discussion This key is optional. If present, the value of this key must be a CFData object that contains a CGRect (stored by value, not by reference).

## See Also

### Box Keys

- [kCGPDFContextMediaBox](coregraphics/kcgpdfcontextmediabox.md)
- [kCGPDFContextCropBox](coregraphics/kcgpdfcontextcropbox.md)
- [kCGPDFContextBleedBox](coregraphics/kcgpdfcontextbleedbox.md)
- [kCGPDFContextArtBox](coregraphics/kcgpdfcontextartbox.md)