Select the XML Entities ⇒ Reserved Characters command in the Characters submenu of the Convert menu to replace XML entities <, >, ', ", and & with the characters <, >, ', ", and & that they represent. Numeric character references that represent these 5 characters are also converted. If you select some text before using this command, only characters in the selection are replaced. Otherwise, all reserved characters in the file are replaced.
Convert|Characters| and  ⇒ Characters
Convert|Characters|Reserved Characters ⇒ XML Entities