Hello @BarbaraL7879 ,
PDFs can't be directly embedded into the email - only linked to. Only the image versions can be directly embedded into the email. You'd either need to go with the standard PDF email route of encouraging your recipients to click and view the full document (via a text, button, or image link), or you'd need to recreate / emulate the document design in the builder.
See also:
Text links
Image links
Button links
... View more