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# printInteractionController(_:choosePaper:)

Asks the delegate for an object that encapsulates the paper size and printing area for the print job.

```
optional func printInteractionController(_ printInteractionController: UIPrintInteractionController, choosePaper paperList: [UIPrintPaper]) -> UIPrintPaper
```

## Parameters

`printInteractionController`

The shared instance of [`UIPrintInteractionController`](/documentation/UIKit/UIPrintInteractionController) that is managing the print job.

`paperList`

An array of [`UIPrintPaper`](/documentation/UIKit/UIPrintPaper) objects that represent combinations of paper sizes and imageable areas supported by the selected printer.

## Return Value

A [`UIPrintPaper`](/documentation/UIKit/UIPrintPaper) object representing both the paper size and imageable area (or printable rectangle) to use for the print job.

## Discussion

This method is intended for apps (typically document-based apps) that have a notion of distinct paper sizes. The delegate can examine the objects in `paperList` to locate the paper size and printable rectangle combination that is best suited for its needs and return the encapsulating `UIPrintPaper` object. Or it can call the [`bestPaper(forPageSize:withPapersFrom:)`](/documentation/UIKit/UIPrintPaper/bestPaper(forPageSize:withPapersFrom:)) class method of the [`UIPrintPaper`](/documentation/UIKit/UIPrintPaper) class, passing in a specific page size (typically the document size), and return the object returned by that method.

## See Also

[`printPaper`](/documentation/UIKit/UIPrintInteractionController/printPaper)

An object that represents the paper size and printing area for the print job.


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