I have change the data series options like :
Vary color by point
Gap depth
Column Shape
Datalabels

and other properties, that are available when you edit the chart !

The easiest way to figure this out is to use VFP version 7 or later to run a form that contains a graph created by MsGraph. Then you suspend the form and get an object reference to the graph using SYS( 1270 ). Once you have done that, it is a simple matter of using intellisense in the command window to discover what properties and methods the different components of the graph have and what effect changing them has on the graph.