# presentationBackground(alignment:content:) Sets the presentation background of the enclosing sheet to a custom view. ``` nonisolated func presentationBackground(alignment: Alignment = .center, @ContentBuilder content: () -> V) -> some View where V : View ``` ## Parameters `alignment` The alignment that the modifier uses to position the implicit [`ZStack`](/documentation/SwiftUI/ZStack) that groups the background views. The default is [`center`](/documentation/SwiftUI/Alignment/center). `content` The view to use as the background of the presentation. ## Discussion The following example uses a yellow view as the sheet background: ``` struct ContentView: View { @State private var showSettings = false var body: some View { Button("View Settings") { showSettings = true } .sheet(isPresented: $showSettings) { SettingsView() .presentationBackground { Color.yellow } } } } ``` The `presentationBackground(alignment:content:)` modifier differs from the [`background(alignment:content:)`](/documentation/SwiftUI/View/background(alignment:content:)) modifier in several key ways. A presentation background: - Automatically fills the entire presentation. - Allows views behind the presentation to show through translucent areas of the `content` on supported platforms. > Note: Sheet presentations on macOS do not support translucency > or transparency — the background is always opaque. --- 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)