you can set the attribute content of the Report object ExperimentManager.ReportObject
ExperimentManager.ReportObject.content := ExperimentManager.UserReport.content
An example for the internal Report object UserReport is contained in the collection of small examples, which can be opened by the Start Page of Plant Simulation: Category: Tools > Topic: Experiment Manager > Example: Overview.
Of course, you can use any Report object instead of UserReport.
it is the display of the basic object Chart.
A double click onto the display opens the dailog of the Chart object. Open the second tab and select the Chart type Line with Markers.