It has been mentioned in the past as being under consideration, but it is not possible at the moment. See the following:
http://groups.google.com/group/google-chart-api/browse_thread/thread/7a3c3004c165cd60/9df9a33028c20d75 Cheers, K -- You received this message because you are subscribed to the Google Groups "Google Chart API" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-chart-api?hl=en.
