<!--
{
  "availability" : [
    "iOS: 17.4.0 -",
    "iPadOS: 17.4.0 -",
    "tvOS: 17.4.0 -",
    "visionOS: 1.1.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "BrowserEngineKit",
  "identifier" : "/documentation/BrowserEngineKit/BETextSelectionDirectionNavigation/extend(in:by:)",
  "metadataVersion" : "0.1.0",
  "role" : "Instance Method",
  "symbol" : {
    "kind" : "Instance Method",
    "modules" : [
      "BrowserEngineKit"
    ],
    "preciseIdentifier" : "c:objc(pl)BETextSelectionDirectionNavigation(im)extendInStorageDirection:byGranularity:"
  },
  "title" : "extend(in:by:)"
}
-->

# extend(in:by:)

Moves the selection in the specified directions by granularity, in response to different key combinations:

```
func extend(in direction: UITextStorageDirection, by granularity: UITextGranularity)
```

## Discussion

word = shift + option + left/right
paragraph = shift + option + up/down
line = shift + command + left/right
document = shift + command + up/down

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)