Has anyone figured out how to change the default formatting of a collapsible heading? I love that it's a heading style, as that supports the linking functionality. But I'd LOVE the ability to be able to make it a Heading 2 or Heading 3, depending on how we're leveraging it in a page.
On a different note -- I'm disappointed Microsoft veered away from the standard collapsed/expanded icons -- usually, these are elegant right pointing arrow heads for collapsed and down pointing for expanded. The down arrow for collapsed and up for expanded is not only not what we've seen for 20 years, they're the opposite of intuitive -- we get complaints that our sections have no content. It'd be ideal to select icons and states for this, but I know that's a pipe dream.