There are various special characters for typographic and formatting purposes in QuarkXpress. You can enter such special characters using keyboard commands or
Choose them from the Utilities > Insert Character submenu. Each character displays differently when invisibles are showing (View > Invisibles).
To insert a special character other than a space — such as an em dash or a current page number placeholder character — at the text insertion point, choose Utilities > Insert Character > Special or Utilities > Insert Character > Nonbreaking Special.