---
title: "splitViewController(_:displayModeForExpandingToProposedDisplayMode:)"
framework: uikit
role: symbol
role_heading: Instance Method
path: "uikit/uisplitviewcontrollerdelegate/splitviewcontroller(_:displaymodeforexpandingtoproposeddisplaymode:)"
---

# splitViewController(_:displayModeForExpandingToProposedDisplayMode:)

Asks the delegate to provide the display mode to use after the split view interface expands.

## Declaration

```swift
optional func splitViewController(_ svc: UISplitViewController, displayModeForExpandingToProposedDisplayMode proposedDisplayMode: UISplitViewController.DisplayMode) -> UISplitViewController.DisplayMode
```

## Parameters

- `svc`: The split view controller whose interface is expanding.
- `proposedDisplayMode`: The proposed display mode to expand the interface to.

## Return Value

Return Value The display mode to expand the interface to. This value may be the same as proposedDisplayMode, or you may return a different value.

## Discussion

Discussion This delegate method only applies to column-style split view interfaces. For more information, see Split view styles. When the split view controller transitions from a horizontally compact to a horizontally regular size class, it calls this method and asks you for the display mode to use when that transition is complete. Use this method to customize the display mode you’re expanding to. For example, you might use this opportunity to adjust column widths before returning the display mode to use.

## See Also

### Expanding the interface

- [splitViewController(_:willShow:)](uikit/uisplitviewcontrollerdelegate/splitviewcontroller(_:willshow:).md)
- [splitViewController(_:didShow:)](uikit/uisplitviewcontrollerdelegate/splitviewcontroller(_:didshow:).md)
- [splitViewControllerDidExpand(_:)](uikit/uisplitviewcontrollerdelegate/splitviewcontrollerdidexpand(_:).md)