General Tab (PlotCube)

The XScale textbox value scales the X dimension of the PlotCube as a percentage of its Z dimension.

Chart3D.ChartArea.PlotCube.XScale

The YScale textbox value scales the Y dimension of the PlotCube as a percentage of its Z dimension.

Chart3D.ChartArea.PlotCube.YScale

For more information, see Customizing the PlotCube.