---
title: NSBorderlessWindowMask
framework: appkit
role: symbol
role_heading: Global Variable
path: appkit/nsborderlesswindowmask
---

# NSBorderlessWindowMask

The window displays none of the usual peripheral elements.

## Declaration

```occ
static const NSWindowStyleMask NSBorderlessWindowMask;
```

## Discussion

Discussion Useful only for display or caching purposes. A window that uses NSBorderlessWindowMask can’t become key or main, unless the value of canBecomeKey or canBecomeMain is true. Note that you can set a window’s or panel’s style mask to NSBorderlessWindowMask in Interface Builder by deselecting Title Bar in the Appearance section of the Attributes inspector.

## See Also

### Deprecated

- [NSTitledWindowMask](appkit/nstitledwindowmask.md)
- [NSClosableWindowMask](appkit/nsclosablewindowmask.md)
- [NSMiniaturizableWindowMask](appkit/nsminiaturizablewindowmask.md)
- [NSResizableWindowMask](appkit/nsresizablewindowmask.md)
- [NSTexturedBackgroundWindowMask](appkit/nstexturedbackgroundwindowmask.md)
- [NSUnifiedTitleAndToolbarWindowMask](appkit/nsunifiedtitleandtoolbarwindowmask.md)
- [NSFullScreenWindowMask](appkit/nsfullscreenwindowmask.md)
- [NSFullSizeContentViewWindowMask](appkit/nsfullsizecontentviewwindowmask.md)
- [NSUnscaledWindowMask](appkit/nsunscaledwindowmask.md)