# chartSymbolSizeScale(domain:mapping:) Configures the symbol size scale for charts. ``` nonisolated func chartSymbolSizeScale(domain: Domain, mapping: @escaping (Domain.Element) -> CGFloat) -> some View where Domain : Collection, Domain.Element : Plottable ``` ## Parameters `domain` The possible data values plotted as symbol size in the chart. `mapping` Maps data categories to symbol sizes. --- 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)