Another specific configuration method. Like Plot.limit, also subject to changes before release on the name (and on whether it should be a distinct function) but status quo bias is strong.

Accepts a string, a function, or None:

(
    so.Plot(tips, "day", "total_bill", color="sex")
    .add(so.Bar(), so.Agg(), so.Dodge())
    .label(x=str.capitalize, y="Total bill ($)", color=None)
)

This API will entail a separation between the text of the labels and any other configuration of them, and I am not sure where other configuration should live as of the moment.