# PresentationDetent.Context Information that you use to calculate the presentation’s height. ``` @dynamicMemberLookup struct Context ``` ## Topics ### Getting the height [`var maxDetentValue: CGFloat`](/documentation/SwiftUI/PresentationDetent/Context/maxDetentValue) The height that the presentation appears in. ### Supporting types [`subscript(dynamicMember _: KeyPath) -> T`](/documentation/SwiftUI/PresentationDetent/Context/subscript(dynamicMember:)) Returns the value specified by the keyPath from the environment. --- 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)