---
title: "collapseSection(at:)"
framework: appkit
role: symbol
role_heading: Instance Method
path: "appkit/nscollectionviewflowlayout/collapsesection(at:)"
---

# collapseSection(at:)

## Declaration

```swift
func collapseSection(at sectionIndex: Int)
```

## See Also

### Instance Methods

- [expandSection(at:)](appkit/nscollectionviewflowlayout/expandsection(at:).md)
- [section(atIndexIsCollapsed:)](appkit/nscollectionviewflowlayout/section(atindexiscollapsed:).md)