How do you format the table column headings in Swift

Question

The following code displays a swift table with all of the correct data. But, I am unable to figure out how to format the table column headings (such as Index Funds and Shares). I would like to change the font size and center the text. Any assistance will be appreciated.

struct SummaryTable: View {
    private var localArray: [TradingDayPrices]
    init(passedInArray: [TradingDayPrices]) {
        self.localArray = passedInArray
    }
    var body: some View {
        let funds: [Fund] = GetSummaryTable(localArray: localArray)
        Table(funds) {
            TableColumn("Index Fund") { value in
                Text(value.name)
                    .padding(.vertical, 2)
            }
            .width(90)
            TableColumn("Shares") { value in
                HStack {
                    Spacer()
                    Text(value.shares)
                    Spacer()
                }
            }
            .width(90)
            TableColumn("Share Price") { value in
                HStack {
                    Spacer()
                    Text(value.sharePrice)
                    Spacer()
                }
            }
            .width(90)
            TableColumn("Total") { value in
                HStack {
                    Spacer()
                    Text(value.total)
                }
            }
            .width(110)
            TableColumn("One Year Gain") { value in
                HStack {
                    Spacer()
                    Text(value.percentChange)
                    Spacer()
                }
            }
            .width(90)
        } // end table
        .tableStyle(.inset(alternatesRowBackgrounds: true))
        .padding([.leading, .trailing], 185)
        .padding([.top], 30)
        .padding([.bottom], 700)
    }
}