Thank you for the reply and the understanding! Yes, I agree about doing the math. Originally, I thought I could apply the math in the bounds parameter. I didn't realize that I could do so in the value parameter.

Thanks to Javier from swiftui-lab. Here is what he posted: As far as I know, the Slider requires a range where the lower bound of the range is "lower" than the higher bound. You can work around that problem, if you use an intermediary binding, that converts the value. In the example below, I called it bridge: struct ExampleView: View {    @State private var value: Double = 0.5    let range = 0.3...1.3        var body: some View {      let bridge = BindingDouble(get: {        return range.upperBound - value + range.lowerBound      }, set: {        value = range.upperBound - $0 + range.lowerBound      })            Form {        Text("Value = \(value)")                Slider(value: bridge, in: range, onEditingChanged: {          print("\($0)")        })      }    } }