I need to have multiple subtitiles at the top of the chart. Or multiple lines of sub titles. I can't use html formatting with a "<br>" or "useHtml:true" because this does not seem to work in the export.

Can you add support for either:
a) Multiple lines of subtitles (that look the same in the exported chart)
or
b) Support the subtitle useHTML:true along with html formatting in the export of jpg, png, etc...