There is a great subdomain "charts.outsystems.com" that explains how the charts can be customized.
However, I think it is missing some crucial information.

For example, there is the following page that explains different chart types and how to implement them:

https://charts.outsystems.com/samples/chart-with-multiple-chart-types

There is a warning there implying that it is not possible to do a "step line chart" with the config options of the chart block (see attachment):

"Currently, it's possible to convert any series to the following types: Line, LineSpline, Area, AreaSpline, Column, Bar and Pie."

In reality, it is actually possible to do this with addon extensibility configurations; i.e. with a certain client action (SetHighchartsSeriesConfigs) from the Charts library, as partly explained in this video:

https://www.youtube.com/watch?v=uzNnX7oqhNY

It would be great if such information is also added to the https://charts.outsystems.com/ subdomain.