A very useful feature in Word is the Reveal Formatting pane. The keyboard shortcut is Shift-F1. Click on different paragraphs to give try it out.
Thanks to Bruce Conradie for telling me about it. I love learning new things like this.
The Reveal Formatting pane is also mentioned in instructions about how to format a business letter. They are part of a manual about how to format a document manually in Word 2019. Go to the Manual contents