The charts do not support this. If you are a brave and enterprising soul, you can dive into the SVG and try to add them yourself. You'll need something like jQuery to get at the contents of the iframe the charts are built in (and I believe there is an SVG plugin for jQuery as well).
This is no easy task, and I wish you the best of luck. Personally, I found it easier to layer images or divs on top of the chart and position them with CSS. -- You received this message because you are subscribed to the Google Groups "Google Visualization API" group. To view this discussion on the web visit https://groups.google.com/d/msg/google-visualization-api/-/H3FHATpn2KUJ. 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-visualization-api?hl=en.
