Can I change the font style for text header_h1 and text header_h2 for templates 7 and 9. I have tried to do it in the Custom XML but to no avail. Can it be done and if so, how?

Also, can I add another text header line, something like text header_h3, _h4 etc? If so, how can I do that as well?

Thank you:
Jason Mulcahy