Build 3.0.0.153 of xlsgen exposes automatic positioning of key chart elements in the object model.

This AutomaticPosition property is exposed in the IXlsChartOptions interface, next to properties such as the position. It's useful for cases where the precise location (X,Y) of a chart element is not wanted, and the client application would rather rely on the renderer's built-in algorithm for setting said chart element nicely in the chart.