When you turn on vertical text in a word processing document with facing pages on, all footnotes go to the left side of each left page, even if the reference page is on the right page.
If you copy a text box or shape that contains vertical text and then paste it into a Pages, Numbers or Keynote document, the object appears in the other document with vertical text.
To paste vertical text from the body of one Pages document into another and keep the vertical formatting, the other document must have Vertical Text turned on in the Document Accents, emoji and special characters in Pages on Mac