This defines the chart that is mounted at positionOfPremadeCharts. All other charts will be automatically positioned and rotated beside this chart (unless you explicitly set their position via "chart.Position_worldspace"(todo link)). The reason for this setting is as follows: Draw XXL trys to automatically rotate the premade charts so that they face the camera. If you look at premadeChart0 and rotate the Scene View camera, then everythings looks nice and convenient, provided premadeChart0 marks the rotation pivot. Though when you focus the Scene View camera on premadeChart9 and then rotate the Scene View camera, then this premadeChart9 may quickly and unintuitivly leave the displayed area of the camera, since it does not rotate around its own origin, but around the origin of premadeChart0, which is far away. So this setting appoints your "most important" chart of which you assume that it will be the one where you look at the most time. You can bypass the whole problem by setting this "premadeChartThatIsRotationPivot" value to "-1". Then all charts will be rotated around their own origin, but it has the disadvantage, that the charts can appear intersecting each other depending on the view angle. This disadvantage can be mitigated by setting the distance between the charts to a higher value via SetDistanceBetweenNeighboringPremadeChartsTo_customDistance.