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

# expandSection(at:)

## Declaration

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

## See Also

### Instance Methods

- [collapseSection(at:)](appkit/nscollectionviewflowlayout/collapsesection(at:).md)
- [section(atIndexIsCollapsed:)](appkit/nscollectionviewflowlayout/section(atindexiscollapsed:).md)