# substroke(range:) Returns a copy of this stroke containing the control points in the given range. ``` func substroke(range: ClosedRange) -> PKStroke ``` ## Parameters `range` The range of control points in the receiver to copy to the returned stroke. ## Return Value A new stroke containing only the control points within the specified range. ## Discussion Maintains information for PencilKit rendering to make the copied part of the stroke render the same as the receiver. The returned stroke may have a `renderState` set to maintain this information. --- Copyright © 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)