How do I produce graphs that are bigger or smaller than the default 400 x 300?
There are a number of properties that you will need to adjust. Height and Width control the size of the image but do not affect the graph features or their position. For a pie chart CentreX and CentreY control to position of the pie and PieDia defines the size of the pie. For bar charts and line graphs OriginX and OriginY position the origin. MaxX and MaxY specify the length of the axes. For all graphs the legend is positioned by LegendX and LegendY and ShowLegend can be set to false to hide it competely. Refer to the instructions for full details of all the properties.