If you are trying to make specific changes to all instances, you can just make the change in the macro. See how search & replace macro replaces the text across pages/sections/notebooks. You need something like:
For each Text in CurrentSection
  That hasProp(...) << Find specific text like how this macro does either based on value or based on formatting properties
  Modify property(...) << Change specific properties as you want

Fair enough. That explains why my modifications to the script didn't work.
Is it possible to search for text with similar formatting and cycle through the text so that I can make changes to said formatting?  I have 1200 pages I'd rather not manually hunt through to change text formatting on.

Dynath: In OneNote you can't select text from a page that is not opened on the screen.