---
title: isSheet
framework: appkit
role: symbol
role_heading: Instance Property
path: appkit/nswindow/issheet
---

# isSheet

A Boolean value that indicates whether the window has ever run as a modal sheet.

## Declaration

```swift
var isSheet: Bool { get }
```

## Discussion

Discussion The value of this property is true if the window has ever run as a modal sheet; otherwise, false.

## See Also

### Managing Sheets

- [attachedSheet](appkit/nswindow/attachedsheet.md)
- [beginSheet(_:completionHandler:)](appkit/nswindow/beginsheet(_:completionhandler:).md)
- [beginCriticalSheet(_:completionHandler:)](appkit/nswindow/begincriticalsheet(_:completionhandler:).md)
- [endSheet(_:)](appkit/nswindow/endsheet(_:)-4dmmq.md)
- [endSheet(_:returnCode:)](appkit/nswindow/endsheet(_:returncode:).md)
- [sheetParent](appkit/nswindow/sheetparent.md)
- [sheets](appkit/nswindow/sheets.md)