[TYPO3] htmlArea RTE - how to add paragraph types in the paragraph type s elector?

[Jody Cleveland]

Hello,

I'm running typo 3.8.1 with TemplaVoila .4, and htmlArea RTE 1.0.1. 

I'd like to add my own custom styles to the Paragraph Type Selector
(formatblock). So, in my root page TS Config, I put this:

RTE.default {
  classesParagraph = mainBodyText, header2
}

But, I still see just the default items in there.

How do I customize the Paragraph Type Selector to include custom styles
from my stylesheet?

- jody