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# browser(_:shouldSizeColumn:forUserResize:toWidth:)

Used to determine a column’s initial size.

```
@MainActor optional func browser(_ browser: NSBrowser, shouldSizeColumn columnIndex: Int, forUserResize: Bool, toWidth suggestedWidth: CGFloat) -> CGFloat
```

## Parameters

`browser`

The browser.

`columnIndex`

The index of the column to size.

`forUserResize`

Currently, this is always set to <doc://com.apple.documentation/documentation/Swift/false>.

`suggestedWidth`

The suggested width for the column.

## Return Value

The delegate’s desired initial width for a newly added column. If you want to accept the suggested width, return `suggestedWidth`. If you return `0` or a size too small to display the resize handle and a portion of the column, the actual size used will be larger than the size you requested.

## Discussion

This method applies only to browsers with resize type [`NSBrowser.ColumnResizingType.noColumnResizing`](/documentation/AppKit/NSBrowser/ColumnResizingType-swift.enum/noColumnResizing) or [`NSBrowser.ColumnResizingType.userColumnResizing`](/documentation/AppKit/NSBrowser/ColumnResizingType-swift.enum/userColumnResizing) (see [`NSBrowser.ColumnResizingType`](/documentation/AppKit/NSBrowser/ColumnResizingType-swift.enum)).

## See Also

[`-  setWidth:ofColumn:`](/documentation/AppKit/NSBrowser/setWidth(_:ofColumn:))

Sets the width of the specified column.


---

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