The pages in the file I sent do illustrate the different types of message text. I am attaching the same three pages but will circle the instances I am referring to. These are the broad examples of what is shown in the rest of the book.
On the bottom of the first page, you will see that there are two types. The first is displayed and has angle brackets. Right under that is a line with regular text in the middle of two exchanges. That is where the biggest problem lies and why I said that boxes won’t work. If we are using boxes to set off all of the electronic messages, the embedded regular text in this line would be a problem.