Curly braces and other characters appear in the text or headers and footers.
Field codes (field: A set of codes that instructs Microsoft Word to insert text, graphics, page numbers, and other material into a document automatically. For example, the DATE field inserts the current date.), instead of field results (field results: Text or graphics inserted in a document when Microsoft Word carries out a field's instructions. When you print the document or hide field codes, the field results replace the field codes.), are visible.
Display the field results instead of the field codes.
To switch back to displaying the field codes, press ALT+F9 again.
To switch back to displaying the field codes, press SHIFT+F9 again.