This is a quick tip I’d wish I’d known earlier.
If I want to view the paragraph breaks, spaces, hard spaces, and so on in a word processor document, “Formatting Marks” is the setting.
In Microsoft Word, it’s Ctrl + *, or Ctrl + Shift + 8. In LibreOffice Writer it’s Ctrl + F10.
Years ago, I used to use Scrivener. I have no idea what key combination that program uses Formatting Marks.