WebChart.OverrideOptions
From Xojo Documentation
Event
WebChart.OverrideOptions(Options As JSONItem)
New in 2020r1
Supported for all project types and targets.
New in 2020r1
Supported for all project types and targets.
Allows you to override the built-in features of WebChart by modifying the Options parameter passed.
Notes
WebChart is based upon ChartJS. See the ChartJS website for details on the format of the data in the Options parameter.